Dr. Lucien Petypon wakes up after a wild night on the town and finds a young dancing girl called 'Garnaaltje' in his bed. He manages to hide her from his wife Gabrielle, but not from his uncle the General who visits unexpectedly. The General naturally assumes that Garnaaltje is Petypon's wife and invites the two of them to his château for the impending wedding of his favorite niece Clémentine to Lt. Corignon. Unknown to them, Corignon happens to be an intimate acquaintance of Garnaaltje.