The war was over. At long last, Voldemort was dead, and this time, he won't return. Unfortunately, those who were attending Hogwarts during the war were unable to learn anything. So of course, when Hogwarts sent all those students letters offering to have the re-do their previous year, everyone jumps at the chance, all of them thinking that they would finally have a peaceful, or at least uneventful, year at Hogwarts. It wasn't one. Perhaps Draco Malfoy was partially responsible for that. Perhaps the year was doomed to be chaotic from the day it began.
Or perhaps the Fates had a grudge against everyone who chooses the path of a hero.
DISCLAIMER: I DON'T OWN PERCY JACKSON OR HARRY POTTER!! ALL RIGHTS FOR CHARACTERS FROM THE BOOKS GO TO RICK RIORDAN AND J.K. ROWLING! ANYTHING THAT BELONGS TO ME I WILL CLAIM IN THE PROLOGUE!