Free adaptation of a story by León Tolstoi. The young Norbert seeks to earn a little quick money and for this he takes from his friend Matrial a false 500 franc note. He spends it at a photography store and the owner, realizing the scam, decides to pass it on to another of his clients as if it were a real ticket. Whoever receives it is the delivery man Yvon Targe, a man without malice who does not realize that the ticket is false and uses it to buy food. Then it is discovered and detained. He tries to sue the photographer, but he has bribed his assistant Lucien to keep quiet and defend his innocence. Because of the scandal, Yvon loses his job and has to earn a living as the driver of a gang of criminals who plan to deliver a coup destined to not go well.