 Harry s life is in mortal danger yet again, this time more than ever. First, a killer named Sirus Black has escaped from Azkaban Prison, and it seems that he broke out just to finish what his master wanted to do 13 years ago: kill Harry Potter!. Also, for Harry s protection, Azkaban has sent hundreds of Dementors to guard Hogwarts in an attempt to catch Black. But will they turn out to be a great help or a big mistake?