World War I aviator Carbot attempts to establish a commercial airline after the war, for the purpose of delivering the mail to the outermost regions of France.

A young woman's comfortable life with her boyfriend is disrupted when he leaves for military duty, entrusting her to a playboy friend seeking a fake marriage for inheritance. Complications arise as a prince enters the scene, pursuing her romantically.

Daniel Gelin and Juliette Faber star as a blissfully happy honeymooning couple. They are so happy that they arouse the jealous attentions of Satan. The Dark Prince sends an emissary to beak up the romance, but his advocate is promptly challenged by a representative from "up above."