François Cardinaud is one of the richest shipowners in the region. But this success arouses resentment and jealousy. When Marthe, his wife, leaves the home without warning, Cardinaud sees her life cracking little by little.

Reported missing in 1940, Jacques Ledru comes back to Strasbourg as Martin Schmidt. He tracks down his wife Genevieve, but she’s remarried and has taken the head of his shipping company. She and her husband will do anything to get rid of Jacques and keep his company.

The film consists of three novels. The film begins with the fact that the Bernard Blier hero removes a lantern from the entrance to a brothel. The second part is about how the lantern and jewelery were stolen from a young baroness. And in the third part the hero of Louis de Funes hangs a lantern at the entrance to his house.