One Christmas Eve, a carefree young man, Eric, arrives in a small provincial town. Here, he meets Julien, a bar pianist who is his exact double. Julien is in love with Marinette, a pretty waitress, but he is too shy to make any romantic overtures. Eric decides to give the course of true love a helping hand by pretending to be Julien. Meanwhile, Eric’s fabulously wealthy uncle has sent his minions out to bring him back home, so that he may celebrate Christmas in the bosom of his family.

A trucker encounters a dead body on the road home. He reports the incident to the police, who suspect that Jean was responsible for the death, and his new truck is impounded. To make matters worse, the man's widow accuses him of having robbed her husband, and a gang of sinister crooks are also harassing him.