Miquette is a young woman whose beauty and vivacity increase the clientele of her mother's tobacco shop. A Barrymoresque actor believes that Miquette has star potential, but he hasn't sufficient capital to finance her theatrical debut. He manages to get the money by practicing a bit of genteel blackmail on an aging marquis who has romantic designs on the heroine.

In 1917, in a small village in the North, Abbe Gaillard is suspected by the Germans of facilitating the escape of French and Belgian soldiers. A false alibi makes him innocent and he can thus continue his mission, thanks to the devotion of an Alsatian who, in enemy uniform, obscurely serves his country.

Superintendent Thomas is investigating a cabaret owner with suspicious actions.

Commissioner Thomas simultaneously investigates the actions of an oil company, a theft and an assassination, and the kidnapping of a child with look-alikes.

Tongues start to wag after a famous Parisian music hall dancer is rushed to hospital after being found poisoned by arsenic at the Concert Mayol.

In 1914, students living in a boarding house are disturbed by a young woman. On the eve of being called up, one of them declares his love for her. She abandons herself to someone who may not come back.

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 ...

Baron Arnold, a businessman, takes his young wife to Africa where he instructs her to seduce Captain Olivier, an intelligence officer. But Olivier illuminates the baroness on the unsavory activities of her husband as a weapons dealer and entrepreneur of revolutions.

Pierre Tercelin who used to be a prosperous industrialist is now ruined and embittered, having become a mere lock keeper. A widower, he lives with his daughter Evelyne, a music-hall dancer. Claiming he is being persecuted by his cousin Edgar he gets in touch again with another cousin of his he hates, Bernard, a millionaire gun runner,who is also a victim of Edgar. It must be said that both Pierre and Bernard once caused Edgar to go bankrupt... Pierre offers Bernard to join efforts against Edgar. Soon after, Bernard dies of poison, which is only the first of a series of acts of violence. Tiercelin is shot at while going back home, Bernard's son is gunned down while his sister Luciane disappears. Chief-inspector Malouvier - who oddly enough looks very much like the suspect- investigates....