In a 'Percy goes to high school fanfiction', an interesting plot could be Percy accidentally using his powers during a school play and causing chaos. He then has to cover it up by coming up with a really creative excuse. Also, he could be on a quest to find a hidden magical artifact that is somehow connected to his high school. Maybe it's buried under the football field or hidden in the old school attic. Along the way, he has to deal with teachers who suspect he's up to something strange and classmates who want to be his friend just because of his cool 'accidents'.
One idea could be Percy trying to hide his demigod powers from his high school classmates while still using them to solve normal high school problems like bullying. Another could be Percy forming a secret club in school for other kids with special abilities. Or maybe Percy getting into a friendly rivalry with the school's star athlete in a non - combat - related sport like track and field.
Well, a plot could involve Percy being new to high school and having to deal with the typical high school hierarchy. He might find that some of the mean kids are actually being influenced by a minor monster. He could also have to balance his high school homework with his demigod training. And perhaps he meets a new friend who has a latent magical ability that Percy helps to discover and develop. This would add an interesting dynamic to his high school experience.
One idea could be Percy using his unique skills to solve a mystery at school, like a series of strange disappearances in the school basement. Another could be Percy facing a bully who turns out to be a monster in disguise. Or perhaps Percy starting a club at school to teach other students about ancient Greek mythology.
A really interesting plot would be if Percy's friends from Camp Half - Blood transfer to Goode High for some reason. They all have to adapt to the mortal school life while also dealing with the threats that follow Percy, like a vengeful demigod from an enemy camp who wants to expose Percy in the middle of his mortal school life.
Maybe in this high school fanfiction, Percy is on the swim team and Calypso is the manager. There's a big competition coming up and they have to work together to make sure the team is ready. Along the way, they develop feelings. Calypso helps Percy deal with his insecurities about the competition, and Percy shows Calypso that there's more to life than just being popular.
One idea could be a high school talent show where Annabeth and Percy team up for a project that combines Annabeth's strategic mind and Percy's natural athleticism. They could create a unique performance that showcases both their skills and also their growing relationship.
One idea could be Percy getting involved in the vampire - human drama in Forks. Maybe he discovers the secret of the Cullens and tries to find a way to co - exist with them, given his own experiences with different species in his own world.
One possible plot idea could be Percy encountering unique Alaskan mythical creatures that are different from what he's used to in other places. Maybe he discovers a tribe with a special connection to the gods that he has to help protect.
Perhaps there's a prophecy that involves both Percy and Artemis in the high school. It could be about a hidden power within the school that only they can unlock together. They have to navigate high school politics, friendships, and enemies all while trying to figure out the prophecy and save the day.
One idea could be Percy having to deal with a new type of mythical creature that has infiltrated Goode High School. Maybe a group of mischievous satyrs that are causing chaos in the school cafeteria by stealing all the food and Percy has to use his skills to stop them without revealing his true identity to the normal students.
One idea could be Percy having to hide his demigod powers at high school while dealing with a bully who unknowingly has ties to a minor Greek god. This would create a lot of tense drama situations.
Perhaps there's a mystery at Ares High School where strange things keep happening, like students getting sudden bursts of uncontrollable strength. Percy, suspecting it has something to do with Ares, investigates and discovers an ancient artifact hidden on campus that's causing the chaos. He then has to find a way to stop it without getting caught by the school authorities or Ares' minions.