Harry Potter’s third year at Hogwarts starts off badly when he learns deranged killer Sirius Black has escaped from Azkaban prison and is bent on murdering the teenage wizard. While Hermione’s cat torments Ron’s sickly rat, causing a rift among the trio, a swarm of nasty Dementors is sent to protect the school from Black. A mysterious new teacher helps Harry learn to defend himself, but what is his secret tie to Sirius Black?
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