Hogwarts has entered a period of darkness. Harry Potter knows that Voldemort will go to any length to find his cousin Dudley after the Dementors attacked him. Many dispute the Dark Lord’s return, but Harry is not alone: at Grimmauld Place, a secret order gathers to battle the Dark forces. Harry must allow Professor Snape to teach him how to defend himself against Voldemort’s mind-controlling attacks. But they’re becoming more powerful by the day, and Harry’s time is running out…