Harry Potter and the Prisoner of Azkaban finds Harry, along with his best friends, Ron and Hermione, embarking on his third year at Hogwarts School of Witchcraft and Wizardry. After a summer with the Dursleys, Harry is eager to return to school. However, the mood at Hogwarts is grim. An escaped mass murderer is on the run, and the foreboding prison guards of Azkaban have been summoned to ensure the safety of the school.

The atmosphere is tense, and danger lurks around every corner, but Harry is determined to uncover the truth and confront the very wizard responsible for his parents' demise.