This is the story of a wealthy bourgeois who marries his only child, a daughter, to a penniless nobleman because he hopes to use his son-in-law to get a title. The son-in-law is a lazy, affected stereotype; but M. Poirier is also a stereotype, of the obnoxious big businessman. The poor daughter, who falls in love with her husband, lets him walk all over her.
At trial the prosecuting attorney makes a startling confession: the defendant is his son whose pitiful fate led him to murder. The attorney left the young man's pregnant mother, and the unwed poor thing had to fight against a hostile world.
With Jean-Baptiste at the front, Louise takes care of Bébé with the help of Uncle Pierre. The letters she receives from Jean-Baptiste worry her, but Pierre distracts Bébé with a box of tin soldiers. That night, Bébé has a dream of his soldiers vanquishing the enemy, and the next morning, Jean-Baptiste surprises the family by returning home.