Dark times have come to Hogwarts. After the Dementors' attack on his cousin Dudley, Harry Potter knows that Voldemort will stop at nothing to find him. There are many who deny the Dark Lord's return, but Harry is not alone: a secret order is gathering at Grimmauld Place to fight against the Dark forces. Meanwhile, Voldemort's savage assaults on Harry's mind are growing stronger every day. He must allow Professor Snape to teach him how to protect himself before he runs out of time.