Harry Potter is due to start his fifth year at Hogwarts School of Witchcraft and Wizardry. Unusually for a schoolboy, however, Harry is not enjoying his summer holidays. He is feeling neglected by his friends, and, as ever, the Dursleys are making his life a misery. But Harry has had enough. He is beginning to think he must do something, anything, to change his situation. Then the summer holidays come to an unexpectedly dramatic end, and Harry is thrown back into life at Hogwarts School. What Harry is about to discover at Hogwarts will turn his world upside down...