As Jean is walking across the countryside in search of work, he helps and befriends a young woman, Françoise, who is having trouble controlling the cow that she is leading. Jean finds work at a local farm, but he soon finds himself caught in the middle of the conflicts in Françoise's family.
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.
While accompanying his lady to a fashionable casino, Onésime hears someone playing an overpowering waltz on a mandolin, and he starts dancing with his lady. Everyone, from the kitchen hands to the chef, dance until their out of breath.
