Percy jackson is the son of Poseidon. Poseidon is the god of the ocean, so that basically means that he can controll anything and everything in the ocean. He can also cause hurricanes and he is the creator of horses. Percy can't remember a time when he didn't live with his father. Sure, his mother -Sally Jackson- is still alive, but she has her own life. Percy visits whenever he just needs to stretch his legs on land.
After seventeen years, it's finally time for Percy to make a living on the suface, but the villains and the heroes have heard of his powers and from what was once just child's play to get to each other soon turned into a full out war between the good guys and the bad guys.
And what are they fighting about?
Percy of course. Percy who doesn't see why he needs to choose.
Kidnappings will take place and browny points will be scored, but will Percy become a villain or a hero?
Or maybe neither.
At the end, it's his choice.