Harry Potter returns to Hogwarts and discovers that much of the wizard community is in denial about his encounter with the evil Lord Voldemort. Dolores Umbridge, an official from the Ministry of Magic, teaches courses in defensive magic, but this leaves the young wizards unprepared to defend themselves against the dark forces that threaten them. Harry teaches other students, in secret, how to defend themselves.

Harry Potter returns to Hogwarts and discovers that much of the wizard community is in denial about his encounter with the evil Lord Voldemort. Dolores Umbridge, an official from the Ministry of Magic, teaches courses in defensive magic, but this leaves the young wizards unprepared to defend themselves against the dark forces that threaten them. Harry teaches other students, in secret, how to defend themselves.