In the early 1950s, the popular radio show "La Kermesse aux Étoiles", hosted by the famous Jean Nohain, mixing lottery games and performances of various artists, will be disrupted by the adventures of a man and his fiancée seeking to recover a dangerous bottle of perfume (explosive) which was unfortunately mixed with the prizes to be won ...
A married industrialist maintains three mistresses. On the instructions of his wife, the tax inspector seizes the small notebook where he records his illegal dealings. After a stormy marital explanation, the industrialist decides to reduce his costs by getting rid of his mistresses and expresses the intention of returning to legality. But he realizes that everyone, even his wife, prefers the old situation, fraud and mistresses, thanks to which everyone found his little profit.
In the train that takes her back home, Catheine Beryl meets concert pianist André Fuger, a childhood friend of her husband's. The musician is both good-looking and seductive and Catherine soon falls for his charms. The two young people spend the evening and the following night together. The next day, a lost powder compact gives the affair away. At a loss, Catherine runs away from her husband but she has an accident. When she regains consciousness in her hospital bed, Catherine finds Georges, her husband, by her side, pretending nothing has happened.
Inès, a gypsy, pregnant by a rich breeder who abandoned her, finds refuge with a band of smugglers and thieves, led by an old woman nicknamed "the Spider". It is among them that she raises her daughter, Dolores. But her past catches up with her when the wealthy landlord reappears in her life.
Hector and Odette Dupuis' car breaks down in the middle of nowhere, but not far from a luxury hotel. The couple are well off but, being miserly, Odette is determined to keep her budget tight. Fortunately for her, the hotel offers rooms for domestics costing only 35 francs, so she decides to pass her husband as her chauffeur. As far as she is concerned, Odette presents herself as Baroness de Garches and takes a 250 franc room. But their stay soon becomes complicated. For instance, Palureau, a widower with five daughters who is planning to remarry, starts courting the 'baroness'. And that is not all since at the same time Angèle, a chambermaid, makes advances to Hector ! To make matters worse, Ferdinand, Angèle's boyfriend, decides to get even with Hector, his 'rival'. The jealous guy steals a jewel from a guest and has poor Hector accused of the theft.
