Lupin Reveals His Werewolf Condition and How the Shrieking Shack Was Used

Remus Lupin explains that he became a werewolf as a child and how the Shrieking Shack and the Whomping Willow were specifically designed to hide his transformations from other students. He reveals how his friends, Sirius, James, and Peter, became Animagi to accompany him during his transformations, which made his time as a werewolf more bearable.