Madeleine Lebeau, a woman who charges for her easy virtue, has a plan that has some of her customers paying more than others; she tells them she is pregnant and, to avoid complications, the men pay her money and don't hang around for the birth. Yves Furet, a shiftless gambler, who not only encourages her in her business ventures but is also her fiancée, shares the fruit of her non-labor. She latches onto a wealthy widower, Henri Vilbert, who throws her a curve-ball when, after she tells him she is pregnant, he is overjoyed as he has fallen in love with her and is looking forward to becoming a father. She plays along for a while, but becomes ashamed when she sees how Vilbert is devoting his whole life to a child that she isn't carrying. She fakes a miscarriage and his kindness makes her feel guilty and she confesses, but he doesn't believe her. So she tries another plan.

Mr. Dupont, after numerous disappointments in his self-esteem, decides to seek his fortune in Africa. Hired as assistant director in a Prisunic at A.O.I., he begins to sell the plane ticket paid for by his new employer. The boat trip cost him a month's delay and legal proceedings for fraud. Panicked, he decides to flee into the bush where he is sometimes the victim, sometimes the hero of his adventure. Finally, Mr. Dupont, returning to a civilized country, finds himself obliged, in order not to risk prison, to agree to return to the service of the director of the Prisunic as a valet. When he leaves this difficult boss, he only finds a job as a sandwich maker in an exotic cabaret. He is forced to disguise himself as a Black man.

Claudius finds a foal and takes it home to his boss. The men who stole the animal are looking for him. Claudius names him Champignol and trains him for racing. When he grows up, Champignol wins a regional race. But the thieves return, and Claudius is forced to do odd jobs to keep his horse.