Within twelve years of the infamous prisoner named Sirius Black was kept in the dark prison Azkaban. Convicted for the murder of a curse of thirteen people, Black was considered dangerous for magicians, and for the muggle and declared one of the closest associates Volan de Mort. And so he at liberty and on earth there is only one place where he can communicate. Azkaban guards heard more than once, as in a dream Black muttering: "He's at Hogwarts ... He is at Hogwarts." So now Harry Potter is in danger, even in the walls of his magical school, even among his friends.
