Bisclavaret explains to his happily married wife why he's gone so often during the week. He's gone because he's secretly a werewolf!
After a year in the woods without any way to return to human society, Bisclavaret meets an old friend on a hunt, the King. His friend doesn't recognize him, but due to the wolf's immediate submission and interesting character, the King keeps him.
After seeing the wolf's violent response to his old friend's wife and her new lover. He is reminded of his friend's mysterious disappearance, so he has the two questioned. The wife eventually explains that Bisclavaret was a werewolf, and she betrayed him when she learned that.