A band of traffickers seeks to infiltrate among smugglers on the Franco-Belgian border. Josée, a superb girl, is the mistress of Gueule en or, one of the smugglers.

Venturi was once the king of the Pigalle underworld. Today, he lives in retirement with his wife, in an estate near Chantilly. He still receives the takings from a few hôtels de passe and cabarets, enabling him to subsist without financial worries. But a gang of young hoodlums follows in his footsteps, committing robberies and picking fights in the establishments controlled by Venturi. His faithful companion Cristiani is murdered, as is his wife Germaine. Venturi is determined to take revenge.

A young woman's comfortable life with her boyfriend is disrupted when he leaves for military duty, entrusting her to a playboy friend seeking a fake marriage for inheritance. Complications arise as a prince enters the scene, pursuing her romantically.

Sophie Mallet is the lively manager of a detective agency, assisted by Emile Gachit, her conscientious but not very effective right-hand man. One day a fellow named David entrusts her a pack of cigarettes that she is supposed to hand over to a certain John Smith. But David soon disappears while John Smith is murdered. Moreover, a lot of dubious characters prove "very interested" in the pack of cigarettes... Which will keep Sophie and Emile for some time...!

A Belgian village is struck by repeated flooding, all this because they lack a new sewer. But the Ministry delays in providing the funding needed to build it. To alert public opinion, the villagers decide to do something. This "something" will be a play describing the life of their saint patron. Trouble follows, partly fueled by the short-tempered mayor.

Pouske runs the "Le Bienvenu" café with his wife Antoinette and daughter Jeanne. On the market square, the fairgrounds are setting up their rides and the neighborhood is getting ready to party. But Jeanne is about to fall in love with a sweetheart who has come from who knows where to cause trouble.

A young girl from the provinces ends up in Paris and falls into the vicious circle of prostitution, before resolving to denounce her torturers to the police.