During the Occupation, a boarding school in Moulins was placed under the rule of a headmistress committed to collaboration. It is within these walls that Michel, Arthur and Franck, escaped prisoners seeking to cross the demarcation line, find themselves stranded. Three boarders, Manouche, Jo and La Tigresse, discreetly devote themselves to them. Until the day when, aware of the danger, they alert the Resistance through the intermediary of a warden. The three men cross into the free zone, and Michel promises to find Manouche.

Sabine Gravières, married to Edouard, the High Commissioner for Criminal Youth, has a problem: Juliette, her daughter, is not only pregnant but she also refuses to marry Claude, the young man who got her pregnant. It is fair to say that the model set by Juliette's parents is far from ideal. Aware at last of the problem, Sabine decides to try and make it up with her husband.

Philippe Marcillac grew up in Sète, where he specialized in pranks of dubious taste. One day, as a teenager, he organizes a party in an abandoned villa. Philipe finds himself alone with Marie-Titite, who advises him to restart his life on a more serious footing.

As a favor to his grandmother, singer Rudy Hirigoyen agrees to sing incognito, under the name Romano, in the nightclub his cousin Gustave has just opened in a small seaside resort. The staff and musicians are students camping out in the pine forest near "L'Auberge Fleurie". Grandma has rented the apartment above the club to summer guests: Commandant Portafaux and his wife.

Princesse Nadia Vronskaïa is a veteran con artist who uses her feminine wiles to bilk wealthy, susceptible old men. Inevitably, she outsmarts herself when she falls in love with one of her victims. In concert with her new beau, she turns the tables on her former partners in crime.