Scene: Paris. Animals are running loose through the streets.
Nadja: (news report) Nadja Chamack, live above Paris. Escaped animals are invading the city! But Ladybug, Cat Noir and their new friend, Rena Rouge, are already on the spot.
"Yes! I get to see myself as a superhero again!" Alya said excitedly at seeing her superhero alter-ego on-screen.
Scene: The Paris Swimming Pool
Civilian: I'm sure they'll get the animals back in the zoo super fast.
Kim: Right, sir. They are the best! (groans) I wish I could be a superhero. The powers. The secrets. The costume. That would be awesome, right?
Ondine: (laughs) Yeah, sure.
Kim: How can I become one? You think there's some kind of superhero school, or something? Or maybe more like some super secret training facility? (Ondine puts a piece of paper in her swimming bracelet.)
"Or getting some magical jewelry from this super-old man," Master Fu pointed out with a chuckle, getting giggles in agreement from the audience.
Ondine: You wanna know my secret?
Kim: Yeah, totally! I love this game. (Ondine throws her swimming bracelet into the pool. Kim dives in to fetch it, then reads its paper) "I have a serious crush on this boy, but he has no idea." (Ondine blushes. Kim laughs.) That boy's clueless. (gets out of the pool) Okay, now it's my turn. (Kim throws the swimming bracelet into the pool. Ondine dives in after it.)
Ondine: (reads paper) "I can stick my big toe inside my ear"...? (Kim demonstrates. Ondine laughs. Kim gives her the notebook and pen with his feet. To herself) Let's stop beating about the bush. (Ondine notes something down and throws the bracelet into the pool. Kim dives in, retrieves it, and starts to unfold the paper, but then his watch alarm goes off.)
Kim: Ah! The movie! I totally forgot! (gets out of the pool)
Ondine: But we haven't finished yet!
Kim: I've really gotta split. I asked Chloé to come, remember? The girl I told you about in my class? Next time, I promise! (Kim leaves. Ondine reaches out toward him, then picks up the paper and opens it, revealing a heart with Kim's name on it, and "Je t'aime" written below, with more hearts.)
Ondine: (sadly, to herself) The boy I'm crushing on is...you.
"UGH! KIM!" The teens yelled in exasperation at the clueless teen athlete who blushed in embarrassment.
"You do know that I most likely ignored you when you asked me out to that movie?" Chloe asked and Kim nodded, still blushing in embarrassment.
Scene: Hawk Moth's lair.
Hawk Moth: Poor Little Mermaid. How many times have you tried to tell your Prince how you feel? And how many times has he dismissed you? (charges an akuma with dark energy) Fly away, my little akuma, and evilize her! (The akuma flies into Paris.)
Scene: Paris. Cat Noir is being chased by two black panthers.
Cat Noir: Come on, guys, you wouldn't eat one of your cousins, would ya? (Rena Rouge jumps along roofs to a vantage point above the street.)
Rena Rouge: (plays flute) Mirage! (throws energy ball) (Large cuts of meat appear on the street in front of the panthers.)
Cat Noir: How about some tasty chops, instead? (leaps away with his staff. One of the panthers steps on a piece of meat, causing it to disappear. It and the other panther step on more of them, following a trail of vanishing meat until it leads them into the back of a van. Ladybug shuts the van doors, trapping the panthers inside. Civilians cheer Ladybug, Cat Noir and Rena Rouge standing on the edge of a roof.)
"Pound it!" Marinette, Adrien and Alya did a three-way fist-bump together and the main couple kissed at that victory.
Cat Noir: (holds up fist) Pound i— (looks back at Ladybug and Rena Rouge running away) Hey, where're you going?
Ladybug: Rena's about to transform back.
Cat Noir: So you're allowed to know her true identity, but I'm not?
Ladybug: Because I have to get her Miraculous back.
Cat Noir: So what's my role, then? The guy who's always left in the dark? What else are you hiding from me?
Rena Rouge: (Miraculous flashes and she points at it) We really gotta jam.
Ladybug: (still to Cat Noir) Okay, I'll talk to him about it.
Cat Noir: Him? Who's him?
Ladybug: Uh...when the time is right, Cat Noir, I promise. (departs with Rena Rouge)
Cat Noir: (to himself) I hate secrets. (Rena Rouge and Ladybug jump down to the ground behind a building. Rena Rouge detransforms and Alya hands Ladybug the Fox Miraculous in its box.)
"You know I hated to do this, but I had no choice without Master Fu's permission," Marinette apologized sadly to Adrien.
"I know how hard it was for you, Marinette. And sorry for being so pushy about that. It's just I've already been kept in the dark enough at my own home," Adrien said with a sad smile and Marinette touched his hand with tenderness in response.
Alya: We can do this again whenever you want, Lady— (phone rings) Oh! The movie! (runs off, waving back) Later!
Ladybug: Spots off. (detransforms and runs in a different direction)
Tikki: Uh, if you want to get to that movie on time too, you better go the way Alya went.
Marinette: Sorry, Tikki; we'll just have to miss the trailers again.
Scene: The Swimming Pool. The akuma enters the swimming bracelet of the tearful Ondine.
Scene: Hawk Moth's lair
Hawk Moth: Syren, I am Hawk Moth. I'm giving you the power to turn Paris into your own underwater kingdom, for you and your prince. In return, you must bring me Ladybug and Cat Noir's Miraculous.
Scene: The Swimming Pool
Ondine: May they all sink under my sorrow. (She transforms into Syren, and stands up. Her tears now falling into the pool trigger the water to rise up and overflow the pool.)
Scene: Outside the theater. Kim runs up, wearing his regular clothes, except also wearing his swimming cap.
Max: (to Kim) You're 3 minutes and 37 seconds late; everybody's already inside.
Kim: Is Chloé here?
Max: (laughs) Chloé watching Mecha Monkey vs. Cyber Shark 3? I think your swimming cap's on too tight, Kim. (Kim takes off his swimming cap, and hands it to Max.)
"He's not wrong!" Chloe said in exasperation at Kim's expectation of her watching that movie with him and everybody else chuckled in agreement.
Alya: (runs up, panting) Ah, let me guess — (takes two tickets from Max) Marinette hasn't arrived yet?
Max: True to form. We'll save you both a seat. (follows Kim into the theater along with his robot friend, Markov.)
Alya: (to herself) Marinette, Marinette, Marinette. (Back outside the swimming pool, people scream and run when water spills out under the doors.)
Scene: Master Fu's massage shop. The gramophone closes with the Fox Miraculous back inside the Miracle Box.
Master Fu: Perfect. Now come and tell me what's bothering you, Marinette.
Marinette: Huh? How do you...?
Master Fu: (laughs and turns to Wayzz and Tikki) Hold on. You both stay here.
Wayzz and Tikki: Oh, Master, please!
Master Fu: Kwamis must never know the recipe that can modify their powers. Ever!
Marinette: Modify their powers?
Master Fu: Imagine what would happen if one of you were captured by a villain, just like Hawk Moth's kwami, Nooroo.
Wayzz and Tikki: (scared) Ohh! (both fly away and into the shop's mattress)
"OK, kwamis. I'm gonna transport you to the Dupain-Cheng bedroom, so you won't have to hear this! I'll bring you guys right back," Angel said to the four kwamis in the room who nodded in understanding, then snapped her fingers to make them disappear. Master Fu then gave Angel an appreciative nod.
"Why can't the kwamis learn about this stuff?" Alya asked curiously to Master Fu and the two heroes and the audience turned their attention to them, curious as well.
"Because the kwamis have to obey whoever wears their Miraculous, good or evil. Imagine if someone just as sinister and evil as Hawk Moth wears a Miraculous and their kwami tells them how to modify their powers," Master Fu explained and everybody else nodded in understanding.
Master Fu: So, what's on your mind, Marinette?
Marinette: Master Fu, Cat Noir is asking more and more questions. He's tired of being left in the dark.
Master Fu: Tell me, Marinette; do you put the noodles in the water before the water boils?
Marinette: Uh, no.
Master Fu: Exactly. That's because there's a right time for everything. (pours some tea and hands a cup to Marinette)
Marinette: Uh, what are you cooking exactly?
Master Fu: When fed with a specific blend of ingredients, the kwamis can grant special power. Each power's specific mix is listed here, encoded in the Grimoire. I've deciphered most of the ingredients; for example, to trigger aquatic powers you need a branch from the dragon king's garden — that's seaweed; then secret kept in a shell — that's an oyster pearl. But the last one still puzzles me: a tear of joy. I can't figure it out, and it's required for almost every blend. Oh! Maybe it could be some dancing ant honeydew. (puts drops from a bottle into his potion with an eyedropper, producing a small blast) I think I may have finally got the right mix. (Marinette smiles.)
Angel then snapped her fingers to bring the kwamis back in the theater room.
Scene: Bank of the Seine. Civilians scream and run away as the river starts to overflow.
"Why did Syren flood the city in water?" Kagami asked curiously.
"She was trying to turn the city into an underwater kingdom for herself and Kim," Marinette explained and the Japanese girl nodded in understanding.
Scene: Adrien's room. He is lying on his couch, playing with Ladybug and Cat Noir action figures.
Adrien: (imitating Ladybug) Hey, Cat Noir, do you trust me? (as himself) Sure, Ladybug; do you trust me, too? (as Ladybug) Are you kidding? I will never trust you! Ha ha ha ha! (normally, to Plagg) You must know what Ladybug's hiding from me, Plagg.
"Excuse me? I don't sound anything like that!" Marinette said, offended by her boyfriend's imitation of her with their action figures. Adrien blushed in embarrassment while everybody else chuckled in amusement.
Plagg: I'm just a kwami, Adrien, and we kwamis have a right to remain silent.
Adrien: Pity. (gets out his phone) Just when I was about to order you some very tasty cheese. Have you ever sampled La Trappe d'Échourgnac? It says here it tastes like walnuts.
Plagg: (swallows some Camembert) I can't be swayed, sorry.
Adrien: Did you know about the Fourme de Montbrison? Apparently, it's the oldest cheese in the world.
Plagg: (nervously) You don't say.
Adrien: Yes...and do you know why its rind is orange? Because they age it on special boards of spruce wood.
"Dude, how do you know so much about cheese?" Nino asked his best friend with a weirded-out look on his face.
"I do my research. You never know when I need to bribe Plagg," Adrien said with a teasing smirk towards his kwami who looked away while the others laughed at the latter.
Plagg: (flies into the bathroom) There's only one thing in this world that smells as good as cheese. (Plagg sniffs heavily from one of Adrien's dirty socks in a laundry basket and Adrien talks to Plagg into the bathroom while he sniffs the socks.)
"Ewwww!" The audience reacted in disgust to Plagg sniffing one of Adrien's dirty socks.
Adrien: Which one do you prefer, the Tomme de Bouche, or the Saintignon? (Plagg screams.)
"SERIOUSLY, PLAGG?!" The other three kwamis asked the Black Cat Kwami who looked down and slowly gobbed his cheese sheepishly while the others still laughed at him.
Scene: Master Fu's massage shop. Wayzz drinks some of the power blend.
Wayzz: Mmmm, there's a slight flavor to it. Yes, I remember it being a lot like this.
Master Fu: Ha! I knew it.
[Transformation Sequence]
Master Fu: (raises his Turtle Bracelet hand) Wayzz, power up! (Wayzz stiffens momentarily, then relaxes again, unchanged.)
Wayzz: A little more salt, maybe?
Master Fu: Oh, failed again. (Marinette's phone rings.)
Marinette: Hey Alya...yeah, what's up? The movie? Oh, uh, of course I didn't forget. I'm almost there. (runs out the door) Sorry, Master. Good luck finding the secret ingredient. (Master Fu sighs disappointedly.)
Scene: The theater
Marinette: (runs up, panting) Coming! Sorry, I was—
Alya: No time to explain. Come on! (She and Marinette run inside the theater. Floodwater approaches the theater.)
Rose: (waving from her seat) Hi!
Nino: Hey!
Marinette: (shuffling into her seat) Sorry...sorry...sorry. (Movie starts to play. People in the frontmost row get up and run out, followed by people in rows succeedingly further back doing the same.) What's going on? (Water rushes under the seats where Marinette is sitting. She, Alya, Nino, Max, Kim, and others in that row lift their feet onto their seats. Out in the streets, people scream as flooding water rages. Water also rushes into the theater.)
Alya: Okay, who left the faucet running?
Marinette: The stairs! Quick!
Fleeing girl: Hurry up!
Marinette: (on the stairs) Everyone, up on the roof! (People run upstairs toward the roof; water floods the stairway right behind them.)
Scene: Adrien's room. Plagg continuously flies around inside Adrien's sock, trying to drown out Adrien while he follows Plagg around the room.
Adrien: Tome de Quraish with truffles; raw milk Camembert, aged on vine leaves marinated in Emmental juice. (Adrien stops when he sees water flooding the floor of his room.)
Plagg: Looks like your whole cheese strategy will have to tread water.
Adrien: (tersely) Don't worry, this isn't over.
[Transformation Sequence]
Adrien: Plagg, claws out! (Adrien transforms into Cat Noir.)
Scene: Theater roof. The entire city is flooded almost to that level.
Markov: (Marinette gasps.) My circuits are sensitive to water.
Kim: Wha, ho, ho, ho! Ha, ha! (runs and dives off the roof into the water) Come on, guys! I can teach you to swim in two seconds flat, Markov. You just put your arms like this, then you push your legs, and it's kind of like being a frog, you see. In fact, it helps to think as a frog, too, you know— (A fin is seen approaching in the water. Syren leaps out, and dives back in, pushing Kim underwater with her.)
"You do know a robot can't be wet, let alone swim, right?" Max asked in exasperation as well as everybody else at Kim trying to teach Markov how to swim on-screen. Kim nodded sheepishly while scratching the back of his head in embarrassment.
Max: (frantically) Kim! (Marinette quietly slips away from the others.)
Alya: (runs to the edge of the roof and looks out) Where is he? Can you see him? (sees Marinette paddling away from the theater in a trash bin) Marinette, what are you doing?
Marinette: Um, I'm gonna go get help. (tips the bin, falling into the water, and grabs hold of the bin) I'm fine!
Alix: (deadpan sarcasm) Okay so...I guess we're saved, then? (Underwater, Syren speaks to Kim.)
"You don't have any faith that I can help, Alix?!" Marinette jokingly asked her friend and everybody else giggled in response.
"Sorry. It's just weird seeing you paddling away in a trash bin," Alix said sheepishly.
Syren: Kim! I found you at last. (blows an air bubble, and places it over Kim's head so he can breathe. On the water surface, Marinette has paddled out of sight of the others.)
Marinette: Okay, we're alone.
[Transformation Sequence]
Marinette: Tikki, spots on! Ha! (Marinette transforms into Ladybug. Ladybug dives into the water and swims around. She is nearly swallowed by a giant catfish, but dodges it, and then surfaces. She takes a deep breath and goes back underwater. She spots Syren pulling Kim along with her.)
Kim: Huh! This is amazing! I can breathe underwater, just like a fish.
Syren: I knew you'd love it, and I've got lots of other surprises for you, you'll see— (Ladybug grabs Kim with her yo-yo, and pulls him back away from Syren.)
"Wow! She must really love you, Kim," Mylene noted about Ondine and the others murmured in agreement. Meanwhile, Kim gave a soft smile on how thoughtful Ondine was to him, even when akumatized.
Kim: Hey!
Syren: My prince! (She swims after Kim, grabs him, and pulls back him and Ladybug, who grabs hold of a window railing to stop them as she runs low on air.)
Hawk Moth: (from his lair) With every new environment comes a new set of rules, Ladybug, you won't be able to win this time. Ladybugs can't breathe underwater. Syren, are you going to let Ladybug steal your prince away from you?
Syren: Never! (Cat Noir is leaping between roofs with his staff, until he sees Ladybug come flying out of the water, screaming.)
Cat Noir: Ladybug? (leaps up, catches her, and lands with her on a roof) You didn't tell me you were going swimming today.
Ladybug: I wasn't planning on it; ladybugs aren't exactly cut out for deep-sea diving, you know.
"How did you guys eventually defeat the villain underwater anyways? I never heard how," Alya asked the two heroes curiously and everyone turned their attention to them, curious as well.
"Remember those potions that Master Fu was working on earlier?" Marinette began explaining and the audience nodded in response. "We finally succeeded in finding the right ingredient for our aqua powers which gives us the power to breathe underwater. And after the villain was defeated, we managed to create more powers for ourselves when needed like ice or fire."
"You all will get the idea later in this episode and as we move further along in the show," Angel said and the audience turned their attention back to the screen.
Cat Noir: Cats aren't exactly crazy about water either, you know. Is there any chance you can get us a submarine? (winks at Ladybug)
Ladybug: (responding to his hint) Pawssibly, kitty cat. Lucky Charm! (A potion bowl appears)
Cat Noir: Huh. Well, we can always use it to scoop up the water. It'll just take a long time.
Ladybug: (gasps as she realizes the significance of the bowl) I'll be right back! (starts to run off, but Cat Noir grabs her wrist)
"Time to go to Master Fu and get those new powers!" Marinette explained the significance of her Lucky Charm and everybody nodded in understanding.
Cat Noir: Wait! Where're you going?
Ladybug: (hesitantly) I can't.
Cat Noir: (disappointedly) Say anything. Yeah, I know. But we are a team, aren't we? (turns away from Ladybug) I'm tired of all these secrets.
Ladybug: I'm sorry. It's not exactly easy for me either, trust me. (she leaps away while Cat Noir turns to see her leaving him. Cat Noir sits down on the roof to wait for Ladybug to return.)
"My advice, Adrien: DUMP HER!" Lila said angrily to the blond boy.
"Shut up, Lila!" All the teens in the room retorted back with glares on their faces making Lila pout in defeat.
Scene: Roof of Master Fu's massage shop building
Ladybug: (swings in and lands out of sight) Spots off! (detransforms, hidden, before looking around for Master Fu)
Marinette: Master Fu? Master? (Master Fu has his potion-mixing setup on the roof.)
Master Fu: This way.
Marinette: Cat Noir and I can't defeat the mermaid underwater.
Master Fu: (studying the Grimoire on his tablet) I know, and unfortunately I haven't found the correct blend that could help you both out. (sadly) I've failed you.
Marinette: No way! We are gonna find that last ingredient! (points to Grimoire image on the tablet. Tikki and Wayzz gasp and turn their backs, fearfully remembering Fu's earlier warning.)
Angel snapped her fingers once again to make the kwamis disappear.
Master Fu: The Tear of Joy? I've tried everything: water from the Laughing Fountain, melted snow from the Mountain of Jubilation, drops of pure chocolate extract.
Marinette: But have you tried a real tear of joy?
Master Fu: What?!
Marinette: Come on, tell me a really, really funny joke!
Master Fu: Do you think this is really the time to have fun?
Marinette: Okay, why do you go to bed at night?
Master Fu: (confused) I don't know, uh...
Marinette: Because the bed won't come to you! (Fu chuckles) What goes up, but doesn't move? Stairs! (Fu laughs) What does a snail say when it's riding on a turtle's back? (throws her arms up) "Wooohooo!" (Fu laughs heartily, until a tear comes to his eye. Marinette wipes the tear onto her finger, and carries it over and drops it in the potion bowl. The potion flashes brightly, producing a skyward blast.)
"Those are really lame jokes," Lila criticized towards her enemy, once again getting glares from everyone else.
"Excuse me, those were my jokes, Lila," Adrien pointed out.
"Yeah, like that makes that better," Alya whispered to Marinette and the two girls giggled lightly.
Master Fu: I think you have just found the magic ingredient, Marinette! (Fu gives Tikki a drink from a spoonful of the potion.)
"You're a genius, Marinette!" Rose squealed in excitement and everyone began to follow suit in agreement (except for Lila of course). Meanwhile, Angel magically snapped her fingers to bring the kwamis back again.
Tikki: Mmm! Yummy!
[Transformation Sequence]
Marinette: Tikki, power up! (Tikki's forehead spot glows, and she spins into a flash as she becomes...)
Tikki: Aqua-Tikki! (now has fins and a tailfin instead of arms and legs)
Marinette: Aqua-Tikki, spots on! Yeah! (Marinette transforms into Aquabug, with scaly costume, large blue ponytails with purple ribbons, finny arms and feet, and a "beltbuckle" device. Ladybug admires her new costume design momentarily, and starts to walk away, but stops, pauses, and turns to Fu.)
"Whoa, Marinette! Nice new costume!" Nathaniel said as he tried to take a picture of Aquabug in his mind for him to draw later on. Everyone else (except for you-know-who) murmured in agreement.
"Thanks, though I think I look goofy with my pigtails looking like fins," Marinette said as she observed her Aquabug suit and everyone else chuckled in amusement.
Aquabug: Master Fu, I think it's time you put those noodles into the boiling water.
Master Fu: You're right, Ladybug. I'll take care of it. (Ladybug leaps away.)
"Thanks for telling him that," Adrien said to his girlfriend about him finally meeting Master Fu.
"Well, you needed aqua powers too," Marinette explained back to him.
Scene: Paris rooftop. Cat Noir is still sitting, waiting for Ladybug, until he is frustrated.
Cat Noir: This is so dumb! (stands up) Claws in. (detransforms)
Plagg: (groans) What's taking her so long? (Adrien holds up his hands to Plagg, and starts to pull off his ring a little bit) Whoa, easy! W-What are you doing?!
Adrien: (grimly) If you don't tell me what Ladybug is hiding from me, I'm done!
"Seriously, dude?! You almost quit being Cat Noir?!" Nino asked his best friend in shock as well as everyone else.
"It was driving me nuts that Ladybug's been keeping secrets from me!" Adrien said, defending himself.
"That is still no excuse, young man," Master Fu scolded the young boy who nodded sheepishly. "Anyway, then, it is a good thing that I showed up."
Plagg: You can't do that!
Adrien: (bitterly) Why not? No one'll know if I quit. No one'll care!
Plagg: I will!
Adrien: Why? (cynically) Because you won't have anyone to give you Camembert?
Plagg: Oh, I'm sure there'll be another Cat Noir to give me cheese... (pauses, and turns to Adrien) ...but he won't be you. (Adrien's expression softens)
"Awwww!" Everyone (except for Lila of course) gushed at Plagg being sad and sensitive about being almost separated from Adrien.
"Plagg, that's so sweet!" Tikki said and surprisingly, flew over to give her fellow kwami a tight hug.
"Yeah, yeah! Don't get all mushy with me, sugarcube!" Plagg said as he tried to break away from the hug much to everyone's amusement. But immediately after breaking away from Tikki's grasp, Plagg flew to Adrien's shoulder where Adrien gently stroked the kwami with his finger and he purred in pleasure.
Master Fu: (suddenly appears next to Adrien) Hello, Cat Noir. (Adrien turns and gasps in shock)
Scene: Outside Collège Françoise Dupont, flashback. Adrien is running up to the entrance, when Nathalie gets out of the Agreste limousine at the curb.
Nathalie: Adrien, please reconsider! You know what your father wants!
Adrien: This is what I wanna do! (Adrien hears a distressed groan, and spots Master Fu over near the street corner, on hands and knees, his cane lying nearby, the old man struggling feebly to get up. Adrien runs over, hands Fu his cane, and helps him to stand up.)
Master Fu: Thank you, young man.
Scene: Paris rooftop, present day
Adrien: (gaping at Master Fu, shocked) You! You're the man who—
Master Fu: (holds up a vial of bright green potion) I'll explain everything, I promise. But right now, you must go and help Ladybug! (He gives the vial to Adrien and he takes it)
Plagg: (groaning) Oh, no! I hate transforming.
Scene: The swimming pool, submerged underwater. Kim is seated in the lifeguard's chair, which is surrounded by elaborate ornamentation, inside a large air bubble. Syren is swimming around in the water nearby.
Kim: (chuckles) I love what you've done with the pool! It's awesome!
Syren: This is the pool where the old me tried to pour her heart out to you so many times.
Kim: But, uh...I've never seen a Syren at the pool. (Syren holds up her wrist with her swimming bracelet for Kim to see. Kim stares at it for a moment until he recognizes it, and gasps) Ondine?!
Syren: I'm your Syren now. And you could be my merman. (puts her hands into Kim's air bubble, drawing closer to him) It only needs a kiss, and you'll become just like me!
Kim: You mean I could swim as fast as you?
Syren: (takes Kim's face in her hands, and starts to pull his face toward hers) Yes, Kim! You'll be my Prince, and we'll rule this underwater city together, forever!
Kim: (has puckered his lips for a kiss, until a thought occurs to him) Wait! Does this mean I never get to see Mecha Monkeys vs. Cyber Sharks 3?
"WHAT?!" Everyone yelled in frustration, taken aback to Kim's stupid question on-screen while Kim sunk into his seat in embarrassment.
Syren: (taken aback) What?!
Aquabug: (floating at the far end of the room) Oh, yes you will; don't worry! In fact, you'll probably make it to the next showing! (Syren is angry.)
Aqua Noir: (swimming into the room, with green-finned arms, feet and "tail" on his costume) The three of us can go together. (assuming a position next to Ladybug) I'll even share my popcorn. (Aquabug and Aqua Noir strike fighting poses facing Syren.)
"Huh. Other than the fins, Cat Noir still looks kind of the same in aqua mode," Nathaniel said as he's trying to observe the heroes' new aqua suits for him to draw. Everyone else nodded in agreement at that statement.
Hawk Moth: (from his lair) I knew those Miraculous had hidden powers! Syren! There's too many fish in this sea. Take their Miraculous before they take your merman away in their net! (Syren lunges toward Aqua Noir, and shoves him back against an upper-floor railing. Aquabug pulls Syren back with her yo-yo, but then Syren pulls Aquabug around in the water instead, until she's close to Kim's bubble. Her yo-yo gets disengaged, and Aqua Noir continues the fight with Syren, as Aquabug looks on.)
Kim: Your new outfits are so cool!
Aqua Ladybug: Oh, um, thanks! But tell me, what happened to your friend that got her so worked up?
Kim: We were playing a game of secrets, and I think she was trying to tell me that I'm the boy she likes. But, I was a doofus and didn't realize.
"You think, jockstrap?!" Alix rhetorically asked in exasperation. "Boys are so clueless!"
"AMEN!" The girls in the room loudly said their agreements while the boys just crossed their arms and pouted.
Aquabug: Game of secrets? What kind?
Kim: It's a game Ondine invented. (making explanatory gestures) You write down a secret and put it inside the bracelet's capsule. It's awesome! You wanna know my secret?
Aquabug: (ignoring Kim's question, and noticing Syren's bracelet) That's where the akuma must be! Aqua Lucky Charm! (a car key appears) Car keys? I guess we should hit the road, then. (gives her yo-yo, opened up, to Kim) Here. You can breathe through this. (Kim puts the yo-yo over his nose and mouth and gives Ladybug a thumbs up.)
Syren: (angry at seeing Kim being taken out of the building by Aquabug) Kim! (swims toward the exit)
Aqua Noir: Hey! We're not done yet! (swims after Syren)
Scene: Paris underwater. Syren swims out of the swimming pool building, and searches around for Kim and Ladybug.
Syren: (spotting Ladybug) Ladybug! What have you done to my prince?!
Aquabug: (Kim is seen above water, hiding behind the chimney of a nearby building.) I think he took someone else to the ball.
Syren: I won't let you steal him from me! Kim is mine! (chases after Aquabug)
Aquabug: (using her ear-communicator) Cat Noir! Are you all right?
Aqua Noir: (likewise) Yeah, Bugaboo. Like a fish in water.
Aquabug: Great! Now, be ready to strike! (swims along until she swims through a car with its doors open on both sides, Syren following until she enters the same car) Cat Noir! Now! (Aqua Cat Noir strikes the car's hood with his staff, triggering the car's airbag, which pins Syren inside. Aquabug and Aqua Noir close the car doors on either side, and Aquabug uses the key signal to lock them. She then ties the loop-end of her yo-yo around the car's trailer hitch, and she and Cat Noir swim to the surface.)
Scene: Paris, above water. Aquabug and Aqua Noir leap out of the water, and land on a roof. Aquabug wraps her yo-yo around Aqua Noir's staff, which he then extends, and pulls on like a fishing rod.
Aqua Noir: Looks like I got a nibble! (pulls the car Syren is trapped in out of the water, and lets it impact on the roof; then looks in the car window) How cool! I always wanted a goldfish! (imitates a goldfish breathing with his mouth and flapping his hands on the sides of his head. Aquabug unlocks the car with a key signal. Its door pops open, spilling out water. Ladybug reaches inside, takes Syren's bracelet, and cracks it in her hands, releasing the akuma.)
Aquabug : No more evil-doing for you, little akuma. Time to de-evilize! (captures the akuma and purifies it) Gotcha! Bye bye, little butterfly. (throws the car key in the air) Miraculous Ladybug! (The Miraculous wave removes all the floodwater from Paris, leaving it dry. Syren transforms back into Ondine, in her swimsuit.)
Aqua Noir: Thank you for keeping your promise, M'Lady.
Aquabug : We are a team, aren't we?
Aquabug & Aqua Noir: (fist-bumping) Pound it!
"Always, m'lady," Adrien said before…
"Pound it!" The two heroes once again fist-bumped and kissed in victory.
Scene: Master Fu's massage shop kitchen. Master Fu is holding a rack with seven vials containing potions of different colors. He shows Marinette a paper with matching colored circles and written descriptions of each.
Master Fu: Each blend corresponds to a new power.
Marinette: (takes the paper and scans it) Oh wow! That's a lot of powers!
"Don't we temporary heroes get these new powers? I so want to fight supervillains underwater!" Alya said.
"Depends on who we're fighting," Marinette honestly answered and Alya kept her mouth shut as she can't really argue with that answer.
Master Fu: (gives Marinette the rack of vials) You should keep these vials with you at all times, just in case.
Marinette: (apprehensively) Well...that's not very practical.
Master Fu: Only the ingredients matter. They could be contained in anything.
Marinette: Then...I may just have an idea!
Scene: Tom & Sabine Boulangerie Bakery. Marinette lifts a tray from the oven holding 21 mini-macarons, 3 each of the 7 potion colors, arranged in rows by color.
Tom: My little girl's mini-'macaroons' are ready. Mmm! They look so good! (reaches up to take one)
Marinette: (pulls tray away) Uh, actually, I'll taste them first and see if they are good.
Tom: My daughter baked them! They're bound to be great!
"That's why you didn't want me to taste them!" Tom said and his daughter nodded in confirmation, then turned to Master Fu curiously. "Are they really harmful if a human ate one?"
"I have no idea. This has never really happened before," Master Fu answered with a shrug.
"I'll be a taste tester if you like! I'd love to eat actual magical macaroons," Kim volunteered.
"Figures!" Alix muttered about her athletic rival.
Scene: Marinette's room
Tikki: Mmm! Magical 'macaroons'! I love your idea, Marinette!
Marinette: (putting a red one into a box with other colors) One 'magic-aroon', one transformation.
Tikki: The blue one looks yummy!
Marinette: You'll see. (in a hushed tone) I'm told it's icy. (winks at Tikki)
Scene: The swimming pool. Ondine swims up to the edge of the pool where Kim is waiting for her.
Kim: Wanna play a game of secrets? (holds a swimming bracelet out to Ondine)
Ondine: (chuckles, and gets out the bracelet's note) "Wanna go to the movies with me?" (Kim and Ondine smile at each other.)
"Finally! You asked her out! Now, you can forget all about me!" Chloe said excitedly to Kim and everyone chuckled in agreement.
Scene: Agreste mansion. In the atelier, Nathalie hears the doorbell. The refractor pops out of the wall at the front entrance.
Gabriel: (heard through the speaker, speaking tersely) Who is it?!
Master Fu: (unseen through the "eye") Over here! (The "eye" view shifts left) Lower. (The "eye" view shifts back to the right, and down, revealing Fu) Hello, I'm Mr. Chan. Adrien's Chinese tutor could not come today. I'll be replacing him.
Gabriel: (viewing the stranger with general suspicion) Hmmm.
Scene: Adrien's room. Adrien is practicing Chinese with his tablet.
Translator app: "What time is it?" Xiànzài jí diǎn le? [现在几点了?]
Adrien: "Xiànzài jí diǎn le?" (Master Fu enters along with Nathalie.)
Master Fu: Shí jiān dào le. [时间到了] It's the right time.
Nathalie: Adrien, here's Mr. Chan. He'll be your substitute teacher for today. (leaves the room)
Master Fu: Hello, Adrien. I think you and I should have a little talk. (Plagg flies out of Adrien's clothing and goes over to Master Fu.)
Plagg: Adrien, meet Master Fu, the last Guardian of the Miraculous.
Scene: Hawk Moth's lair
Gabriel: (Holding book with strange symbol) Nooroo! How can I obtain more powers?
Nooroo: What do you mean, Master?
Gabriel: Don't treat me like an idiot! Ladybug and Cat Noir have new powers. How did they do it?
Nooroo: We kwamis do not know the recipes.
Gabriel: It's inside this Grimoire, isn't it? Can't you read it?
Nooroo: Only Guardians can. I don't know anything, I swear!
Gabriel: Well then, I will have to find this Guardian of the Miraculous, wherever he is.
"My father doesn't even realize that the Guardian is right in his home!" Adrien pointed out and everybody laughed hard at the irony.
"It is now awkward considering we had a meeting in the house of Hawk Moth," Wayzz quietly commented to Master Fu who nodded in agreement.
Scene: Adrien's room. Master Fu and Adrien are sitting on the couch, Wayzz and Plagg at their sides. Master Fu takes out a round box from his bag and hands it to Adrien. Plagg gets excited, believing that inside could be Camambert as Adrien opens it, revealing seven wedges of cheese in the colors of the power potions.
Plagg: (groaning in frustration) Oh, no! I hate transforming.
"So, you've said, you lazy pig!" Tikki said, rolling her eyes in annoyance. "So, what's next?"
"The next episode was Zombizou which was Miss Bustier over there," Angel announced, making the young teacher very nervous.
"What exactly did I do as an akuma?" Miss Bustier nervously asked.
"Long story short, you turned everyone into love-inducing zombies powered with magical kisses," Angel answered and everyone nodded in confirmation. "Anyway, let's play!"