Harry Sanders ran out of the ceremony, and boarded a bus to London Knights, on the road, he heard about a little known criminals wizard Sirius Black, is said to have used a spell to kill the 13 individuals, to escape Of Azkaban prison. Harry found that the use of his magic was not to punish the Ministry of Magic.
Soon, Harry has to know why - Sirius Black is looking for him, the Ministry of Magic is more concerned about the security of Harry, and not concerned about whether he used the magic of the aunt. Magic circles are now stuck in panic, informed the Minister of Magic "Muggle" (no magic people) British Prime Minister Tony Blake escape. Hogwarts Dementors have been protected. Over time, Harry has been found that Black and Voldemort's own parents have a relationship.
Harry was found in the story of Sirius Black is no small crime, prison Azkaban wrong when people turn. The real criminals (with a personal mantra killed 13 people) is a small dwarf Peter. Peter will address Harry's parents told Voldemort caused their deaths.
Peter is a阿尼馬格斯, in accordance with the will can be turned into animal, he has been a matter of fact, as Ron's pet rat blood live.
Ministry of Magic do not believe that Harry, and thus continue to believe that small Sirius guilty, but羅恩韋斯萊, He Minge Granger, Albus Dumbledore believes Harry and finally to help them get away a small Sirius.