It all started with a wish, but because it was Percy Jackson it couldn't have been a friendly goddess granting him a wish. No, it had to be Nemesis, goddess of revenge and balance. Now Percy and Annabeth are stuck in a strange new galaxy right when an ancient and powerful darkness finally begins to stir.

Percy is having a great 13th birthday until the old-man knocks on his door. Now, Percy's life is a double mistake because gods aren't supposed to have wizard children. Zeus is furious and banishes him from the country, leaving Percy with no choice but to attend Hogwarts. But, maybe a magic school is his chance to finally have a safe, monster-free, normal school year.