After a year that could only be described as normal - by Hogwarts standards at least - Harry goes back to the Dursleys for the summer, and comes back to school at the start of term changed in ways his friends can't hope to understand. Students start getting petrified at Hogwarts, and all signs are pointing to the boy that already has blood on his hands. Also there's a giant snake roaming the pipes. What could possibly go wrong?