Harry Potter is thirteen years old. After an unbearable vacation with the horrible Dursleys™, he meets up with his faithful friends, Ron and Hermione, to take the train back to Hogwarts™ College. The world of ordinary people, Muggles™, and wizards alike, is in turmoil: according to the latest news, Sirius Black™, a dangerous criminal close to Voldemort™, has escaped from Azkaban™ prison. The prison's formidable guards will ensure the security of Hogwarts™ College, as the escaped prisoner is looking for Harry Potter, responsible for the elimination of his master. So it is under heavy guard that the apprentice wizard begins his third term. On the program: divination lessons, making a shriveling potion, training hippogriffs... But is Harry really safe from the danger that threatens him?