It's after the giant war. The Greeks have made peace with the Romans. It's seems as if there were no more threats for Percy Jackson. Harry Potter thought that defeating Voldemort would be the end of all his worries. Little did he know that there is a new threat arising. In this mash up of Harry Potter and Percy Jackson, watch as Kronos and Voldemort team up defeat their enemies, not knowing that Percy and Harry have a secret past that not even the gods know about. Note- I do not own the Percy Jackson series or the Harry Potter series... This is just my first fan fiction.