Micheline Bertier is as wise as she is graceful, and is the perfect assistant to her boss, couturier Maurice Darnal. Darnal's business is faltering and he has to close down. Micheline's family is also in trouble. Her crazy-headed sister is about to steal her fiancé away from her. At the suggestion of singer Jacqueline François, Micheline goes on tour as an accompanist, and meets up with Darnal in Nice, full of projects he wants to involve her in. Micheline, who arrives in time to save her sister from a suicide attempt, will know how to run the new fashion house.

Cora, the wife of a wealthy Parisian businessman, Daniel, is involved in an affair with Henri, an unscrupulous garage mechanic who has set his sights on Cora's fortune. Daniel becomes suspicious and hires a detective to investigate, but the detective is unsuccessful in pinpointing Cora's extramarital activities.

The two merrymakers Cartahu and Bailladrisse sail together on a cargo ship. When customs officers come aboard to conduct a search, Cartahu is unaware of a drug dealer's accomplice, who hides the box of narcotics in Cartahu's bag, which has already been visited. Unsuspecting, the two comrades go ashore, taking the precious box with them. At the hotel, by mistake, their luggage is given to another person. To recover the merchandise, the traffickers pursue the two friends, who nevertheless manage to have the whole gang arrested; and, after being tempted by pretty women to live with them, prefer to set sail for new adventures.