For a very long time Monsieur de Merret has been suspecting his wife of infidelity. One night he comes home earlier than usual and knocks on the door of his wife's chamber. Right before he enters the room, he hears the door of her closet squeak. Initially, Merret thinks that this is their maid Rosalie, but he is perplexed when the maid enters the room right after him. Merret desires to open the closet so he can once and for all find out the truth about his wife. Who is hiding in the closet and why does Monsieur de Merret think his wife is having an affair? Will his suspicions turn out to have been warranted? Will he open the closet, or his wife will manage to change his mind? Find all the answers in Honoré de Balzac's novel "The Mysterious Mansion".