Harry, Ron and Hermione, now teenagers, return for their third year at Hogwarts. There they are forced to face escaped prisoner, Sirius Black, who poses a great threat to Harry. In addition to new experiences, Harry must overcome the threats of Dementors, outsmart a werewolf and finally deal with the truth about Sirius and his relationship with his parents. Harry and friends master advanced magic classes, cross time barriers and change the course...