What happens when you mix: Senior high school class, the ghost zone, two clueless humans, and the Phantom Trio. Disaster

Young Danny Fenton was just an ordinary boy in Amity park but he was unique. He had powers no one else has. One day, he went to New York for some time alone. He meets Percy Jackson and everything went downhill from there. Follow Danny as he goes on a journey with his new found friend to save the world. //This is after The Last Olympian and before The Lost Hero. And before Phantom Planet. So keep that in mind.