Summer has been normal and boring for Harry Potter until right before the end. Dementors show up in his town and attack him and his cousin Dudley. Harry uses magic to fight off the creatures and, almost instantly, gets sent a letter from the Ministry that is requiring him to go to a disciplinary hearing. At the hearing it will be decided if Harry should be expelled from Hogwarts. At the hearing it is decided that Harry will not be expelled from Hogwarts. Once there, Harry notices a lot of strange things. Skeletal horses are pulling school carriages, but he is the only one that can actually see the horses. Also there is another new Defense Against the Dark Arts teacher named Dolores Umbridge. There are also rumors that Harry and Dumbledore are going crazy for thinking that Voldemort is returning. The only people that stand by Harry’s side are Ron and Hermione. Harry frequently gets detention with Professor Umbridge for lashing out at the people that think he’s crazy. Professor Umbridge soon becomes Hogwarts High Inquisitor which gives her the power to sack teachers whenever she feels that it’s necessary. Because of Harry’s frequent detentions, Professor Umbridge decides to take away the things Harry loves most like Quidditch, Sirius Black’s letters, and the ability to visit Hagrid at his hut. In retaliation, Harry forms a defense group which he calls Dumbledore’s Army. Professor Umbridge soon finds out, and Dumbledore takes the blame. In doing so, Dumbledore has to leave Hogwarts to avoid being arrested. Harry frequently has dreams of dark corridors and locked doors, and his scar prickles very often. Harry then finds out that Sirius Black, Harry’s godfather, was killed, and Dumbledore tells Harry the ultimate prophecy: If Harry doesn’t kill Voldemort, Voldemort will eventually kill Harry.