A wealthy man's wife dies in a car crash; she is survived by him and their daughter. The father learns that he's not her biological father.

Véra, a vivacious woman, and her alleged brother Boris, are both hired by the Dubelairs as their chambermaid and caretaker. But Dubelair has done bad business while his wife Juliette plays at the races and... loses ! So when it comes to paying their domestics wages, Dubelair gives them lottery tickets. Chance has it that one of them is winning...!