the bank

|next day|

"Stiles!" Noah Stilinski shouts, stepping into his son's room, where Stiles is sleeping on the floor in a pile of print outs.

"I've got to get to work, you get to school." Noah tells him once Stiles is up and looks at him, blinking his eyes.

"Dad, any news on Heather?" Stiles asks, before he leaves.

"Nothing yet." Noah replies.

"Man, 10 hours of nothing. Derek's gonna kill me." Stiles says angrily as he starts to collect some of the papers lying in his room.

"Dad, Dad!" Stiles shouts when he sees that his father was the arresting officer at the bank robbery and runs after him.

|at school|

Scott and Lydia arrive at the school parking lot in her car.

"Hey, I know this is a bit weird since we literally just got back together, but I really wish we can repeat last nights' activities more often." Lydia tells Scott as she pulls into a parking spot.

"I left a good impression huh?" Scott asks playfully with a smirk.

"Maybe, who knows? Maybe I just want to get you up to speed as soon as possible." Lydia replies, checking her makeup and glance at Scott with a grin.

"Ouch, that's your win." Scott tells her, giving her a peck and tickling her side before he steps out of the car with her. Once he's out of the car he gets a text on his phone and checks it quickly, hoping for news on the bank.

"Anything good?" Lydia asks him, waiting at the end of her car for him to finish reading.

"Not yet, We meet at Derek's at 5 but don't get started until dark." Scott tells her, putting away his phone.

"You want me to come?" She asks him, leaning into his side with him putting his arm around her protectively.

"No, I'd rather you stay as far away as possible from Derek's uncle for the time being. I know we had a deal but I definitely don't trust him." Scott tells her.

"Right, Peter. You know for a moment I was happy and forgot all about him." Lydia says with a sigh.

"You and me both." Scott whispers giving her one last peck on her cheek before rushing over to Stiles, who pulls up into the parking lot.

|That evening|

Allison has found a matching symbol to the mark the hired gun left on her and Lydia's arms, which leads her to Beacon Hills First National bank. Once there she cuts through the chains with a bolt cutter and makes her way inside, carefully looking around the bank for any clue on the missing werewolves.

While she is looking around Ms. Morell, her French teacher and guidance counselor over powers her and warns her, "Keep your mouth shut and listen close, you have no idea what you've just stepped into. You've got 20 seconds to get your ass hidden. Get into that storage closet there and lock the door. When you hear the fighting start, that's your cue to get out.

"What fighting?" Allison asks.

"Go!" Ms. Morell tells her a final time and walks away while Allison hides in the closet, finding the dead Erica in there, once she turns on her cell lights after she's sure that whoever just walked by the room is gone.

|Meanwhile at Derek's loft|

"You see this? This is how they got in, it's an airvent which leads right to the vaults outer wall. One of the robbers was lowered into this shaft, but the space is so small that it took them about 12 hours to drill into the wall. Stone by the way. Then they sciphoned the cash to the guys on the roof, back through that one little shaft in the wall." Stiles informs Scott, Peter and Derek while marking everything on the buildings' blueprints.

"Can we fit in there?" Scott asks.

"Yes, but very, very, very barely. And they also patched the wall obviously, so we're gonna need a drill of some kind." Stiles answers.

"Forget the drill, If I go in first, how much space do I have?" Derek asks looking at the blueprints.

"What do you think you're going to do Derek? Punch through the wall?" Stiles asks.

"Yes Stiles, I'm going to punch through the wall." Derek tells him annoyed.

"OK big guy, let's see that fist. Big ol' fist. Yeah, get it up there big bad wolf. See this? This is maybe three inches of space for you to gather enough force to punch through that wall." Stiles tells him, putting his flat hand a few inches away from Derek's fist.

Derek punches his hand, basically knocking Stiles over, who holds his hand in pain.

"Ahh, Argh, He can do it." Stiles says, holding his hand.

"I'll get through the wall, who's following me down?" Derek asks.

"Don't look at me. I'm not up to fighting speed yet and honestly, with Issac out of commission you're not looking at very good odds.

"So I'm just supposed to let them die?" Derek asks.

"One of them is already dead." Peter replies carelessly.

"We don't know that." Derek counters.

"Do I need to remind you what we're up against here? A pack of alphas, all of them killers and if that's not enough to scare your testicles back into your stomach, remember that two of them combine to form one giant alpha, I'm sure Erica and Boyd are sweet kids and they're going to be missed." Peter tells them.

"Can someone kill him again please?" Stiles says, set off by Peter's negative inputs.

"Derek, seriously it's not worth the risk." Peter tells his nephew.

"What about you?" Derek asks, looking across the table to Scott.

"Yeah, I mean if you want me to come." Stiles says from his side.

"Not you." Derek says annoyed.

"I'm not a fan of Erica, but Boyd hasn't done anything to deserve this. We have to try." Scott tells him.

"What're you thinking about?" Derek asks, seeing Scott's pensive look.

"Who's the other girl?" Scott says.

|Half an hour later – in Derek's apartment|

"I can't stand waiting around like this, it's nerve wracking." Stiles says, looking at the full moon through a window.

"I could beat you unconscious." Peter offers.

"You think Erica is really dead?" Stiles asks.

"Do you think I care?" Peter replies, lying on a couch without a care in the world.

"I don't understand the bank though, why not chain them up in an underground lair or something? Is it because they're living there, because the vault reminds them of their little wolf dens?" Stiles asks.

"Wolf dens?" Peter asks.

"Yeah, were do you live?" Stiles asks.

"In a hidden underground network of caves in the woods." Peter lies.

"Woah, really?" Stiles asks impressed.

"No you idiot. I have an apartment downtown." Peter tells him.

"Look, that just proves that there is something up with the bank and why wait for the full moon? Why not kill them whenever they want to?" Stiles questions.

"Maybe they think it's poetic." Peter comes back.

"They've already had three full moons to be poetic." Stiles says.

"And you've had one hour to be so anno…" Peter says, stopping mid-sentence as a realization hits him.

"What are the walls made of?" Peter asks Stiles, going over to the blueprints.

"I don`t know? Wood, brick?" Stiles says, looking at the walls of the loft.

"No, the vault. What's it made out of?" Peter asks him, rummaging through the blueprints.

"It doesn't say it, where would it say the material, type of stone?" Peter asks Stiles, finding nothing on the plans.

"Oh, wait. Here, it's gotta be in there." Stiles tells him giving him a huge binder.

While they are researching Derek and Scott start their plan and climb into the vent.

"There, see." Stiles says, pointing at an entry on the page Peter is flipping through.

"Oh, call Scott. Now! Call him now!" Peter tells him.

"Why?" Stiles asks, getting out his phone and calling Scott.

"Because Boyd and that girl aren't going to kill each other. They're going to kill Derek and Scott." Peter tells him.

|bank|

Derek breaks through the wall of the vault, with Scott close behind him.

"Boyd?" Derek asks, seeing Boyd's frame standing across from them in the shadows.

"Boyd, it's me Derek, stay calm." Derek tells Boyd, who is already half transformed and growling at the two.

"Stiles, now is not a good time." Scott says answering his buzzing phone while never taking his eyes of Boyd.

"Scott, Scott. Listen to me, you've got to get out of there." Stiles shouts.

"the walls of the vault are made with a mineral called hycatolite, it scatters the moonlight." Stiles tells him.

"What does that mean?" Scott asks dreadfully.

"It keeps the ,moonlight out, they haven't felt the full moon in months.

"Think of it like the gladiators in the colloseum, they starved the lions so they're more viscious and out of control. Deucalion has kept them from shifting for three full moons, it's the same principal. They're going to be stronger, more savage and bloodthirsty. They are the starved lions and you and Derek just stepped into the colloseum." Peter explains.

"Derek, we've got a problem, a really big problem." Scott says.

"Cora?" Derek asks shocked, when a girls shows herself, stepping out of the shadows next to Boyd.

"Who?" Scott asks, looking at the two werewolves in front of him.

"Cora?" Derek asks stunned, frozen in place.

"Derek, get out. Get out now!" Cora warns him, fighting to stay in control.

Scott sees a line of mountain ash running around the walls of the vaul when suddenly the school's guidance councellor opens the vault and closes the line, filling in the small gap at the entrance.

"No wait!" Scott shouts, trying to run over and stop her, making Cora and Boyd snarl visciously, ready to attack after Scott's sudden movement. Stiles only hears the snarling and growling before the connection is lost.

"Don't kid yourself Maryn. It's not the first time you've gotten your hands dirty." Deucalion tells her, waiting for her beside the vault door and reaches for her arm so she can lead him away.

While Scott and Derek are fighting against Boyd and Cora.

Allison, still in the closet hears the growling and a lot of banging from when one of the four is slammed into the floor or the walls and gets out of the vault, going over to where the noise is coming from while staying hidden.

In the vault Scott is lying on his back, holding away Boyd, who's trying to rip him to shreds until Derek kicks him off Scott only to get attacked by Cora with wild swipes which he dodges. Scott jumps up and pushes her against a pillar in the room.

"You know her?" Scott asks surprised.

"She's my sister. My younger sister." Derek tells him.

"What the hell is she doing here?" Scott asks, standing next to Derek, staring down the other two werewolves across from them while he shifts his talons into normal werewolf claws, something he got courtesy of Derek and Ennis.

"Look out!" Allison shouts, appearing in the vault's entrance and causes Scott to lose focus for a second, which is long enough for Boyd to slash at him and throw him against a wall before pinning him to the ground. Boyd then rams his claw in Scott's abdomen and lifts him off the ground, sliding him up against a wall with Scott coughing out blood and grabbing at Boyd's arm to free himself.

"Don't break the seal!" Derek shouts while keeping Cora under control, when he sees Allison about to remove mountain ash from the vaults entrance.

"Boyd!" Allison shouts, getting the large teen's attention momentarily, enough so Scott can free himself, sprouting wings to fly out of Boyd's reach before letting them disappear while he drops down on the large teen, slamming him into the ground and screeches at him violently while shifting one hand into his Kanima claws and scratches Boyd across the back of the neck.

He then jumps over to Cora and give her the same treatment.

"Thanks." Scott says coughing out more blood and falls to his knees on the ground exhausted.

"Will it last?" Derek asks, lying down his sister next to Boyd gently.

"I hope." Scott replies.

"Come on let's get out of here." Scott says, going over to the vault while holding his abdomen.

"OK, Allison, break the seal." Derek agrees, looking back at his sister and Boyd, who are lying unmoving on the floor, only able to snarl due to Scott's paralyzing poison.

Allison looks at Scott and Derek, deciding whether she should let them out.

"What are you doing? Open the damn seal and let us out before you put it back in place." Derek shouts angrily, seeing her just standing there.

"Why did you do it?" Allison asks accusingly, tears swelling up in her eyes.

"What? Are you crazy?" Derek shouts pissed off.

"I'm crazy? I'm not the one turning teenagers into killers." Allison shouts back.

"No, that's just the rest of your family." Derek replies.

"I've made mistakes but Gerard is not my fault." Allison tells him.

"And what about your mother?" Derek asks.

"What do you mean?" Allison asks shocked that Derek would bring up her mother.

"Do you want to tell her or should I?" Derek asks Scott.

"What does he mean Scott?" Allison asks Scott, who is leaning against the open vault door, holding his wound.

"Derek only bit her to save me, she was suffocating me with wolfsbane when he found me." Scott tells her.

"Why didn't you tell me?" She asks horrified.

"Because of this. You were already struggling and I didn't want to make you go through that as well." Scott tells her.

Allison, crouches down and opens the seal, letting the two walk out while tears fall out of her eyes.

"I'm sorry I made things difficult for you and Lydia." She says quietly while closing the seal again.

"Don't worry, everything worked out. It was a rocky path but we got to this point." Scott tells her, putting his hand on her shoulder and sits down across from the vault with a painful hiss.

Derek smells something and goes to the closet Allison hid in earlier, finding his dead beta in there and carries her over to Allison and Scott with sadness rolling off him in waves.

"Sorry Derek, I hated her but she still was your beta." Scott tells his friend.

"I know, thank you." Derek says lying her down on a table with a few tears falling out of his eyes.

"I guess we're going to have to sit tight and wait." Scott says, looking at the still paralyzed teens in the vault.

"Do you want to stay? Or I could call Stiles down here in case we need someone to open the seal, so they won't rip each other apart." Scott asks Allison while he's taking off his shirt to see what his wound is like.

"It's OK, I'll stay." She tells him, sitting down on the same wall he's leaning against and hugs her knees to her chest.