The wizards could be under the control of an evil force that orders them to kidnap the demigods. The demigods, on the other hand, are used to fighting monsters but are now in a strange magical world. They have to use their wits and powers to not only escape but also to find a way to stop the evil force that is behind their kidnapping. This would involve a lot of action and adventure as the demigods explore the wizarding world and face new challenges.
Another idea is that there is a prophecy in the wizarding world that says the demigods will bring either great destruction or great salvation. Some wizards, fearing the worst, decide to kidnap the demigods to prevent the prophecy from coming true. However, as the story progresses, they realize that they misinterpreted the prophecy and that the demigods are actually crucial for the well - being of both the wizarding and the demigod worlds.
A simple plot could be that the wizards need a powerful ingredient that only the demigods can provide. So, they kidnap one or more demigods. For example, a demigod's blood might have special properties for a spell.
Perhaps the wizards see the demigods as a threat. By kidnapping them, they hope to control the situation. In this fanfiction, the demigods could be from different pantheons like Greek or Norse, and the wizards could be from a hidden magical society. The story could focus on how the demigods escape or how they turn the tables on the wizards.
One possible plot could be that the Avengers mistake Percy Jackson for a dangerous threat. Maybe they've been given false information about his powers being uncontrollable. So, they decide to kidnap him to keep the world safe. But once they have him, they start to realize that he's not what they thought. Percy, being a hero in his own right, tries to convince them that he's on the side of good.
Well, in such a fanfiction, there could be epic battles. Demigods with their superhuman strength and wizardry powers could clash or team up. Maybe a demigod and a wizard might have to overcome their differences in magic systems to fight a common enemy like a powerful dark force that threatens both their worlds.
One alternative could be a story about the Dragonborn going on a quest to discover their true heritage. They could travel across different lands, meet various characters who help or hinder them in their search for knowledge about their family and their unique powers.
One idea could be that Draco and Zabini kidnap Hermione for some sort of political gain in the wizarding world. Maybe they think her knowledge or influence can be used to their advantage. For example, they could be part of a group that wants to change the power structure at Hogwarts and believe Hermione holds the key to making it happen.
One idea could be a wizard from a forgotten lineage emerging to challenge the established order in the wizarding world. Maybe he discovers an ancient magic that was thought to be lost.
One possibility could be Percy Jackson as a demigod. He's well - known for his adventures in the demigod world. And for a wizard, Harry Potter could be a great choice. Their encounter would be really interesting as they both have very different personalities and ways of dealing with problems.
It can be shown as a form of cultural exchange. Demigods, with their knowledge of ancient myths and legends from their books, can share with wizards who are more versed in spells and magical history from their own books. For example, a demigod could read a passage from a book about the creation of the world in Greek mythology to a wizard, and the wizard could respond by reading about the creation of Hogwarts. This creates a really interesting dynamic in the fanfiction.
One plot idea could be that Draco and Blaise kidnap Hermione as part of a misguided attempt to gain some sort of leverage in the wizarding war. Maybe they think they can use her knowledge to find a way to end the conflict on their terms. Another could be that they believe she has a hidden power or secret that they want to uncover for their own gain. For example, they might think she has a connection to a powerful magical artifact that they are desperate to get their hands on.
One idea could be that Harry is under a dark spell that makes him kidnap Muggles, but then his friends try to break the spell and save him and the Muggles. Another could be that it's a case of mistaken identity and Harry is wrongly accused of kidnapping Muggles when he was actually trying to protect them from a real threat. Maybe in the fanfiction, Harry kidnaps Muggles to show the wizarding world how wrongly Muggles are treated by some wizards.