Martin is a nurse in a private clinic in Paris. The victim of a serious concussion, an unidentified casualty, arrives in the emergency room one night. He is operated on immediately. When he wakes up, half-unconscious, he tells Martin a confused story about stealing jewels from a maharajah visiting Marseille... before falling into total amnesia. Real and fake policemen interrogate Martin, gangsters kidnap him to get him to reveal precious information, but... the nurse keeps his mouth shut!

An aimless young man is committed to a psychiatric hospital by his father in an attempt to cure him of his delinquent tendencies.

The inhabitants of a poor village want to sell their houses and their land. One day, a woman breaks down in her car while crossing the village. Helped by the villagers, she explains to them the development that water could give to the village

Pépito runs a gang of thugs with authority. He has a natural son, Gaston, a professor of literature in Aix-en-Provence, whom he has hardly ever seen. Gaston announces himself for Christmas, and Pépito decides to make him look good by moving into his headquarters: a château where the crooks will be able to exercise their talents as composers.

André Laroche, an industrialist, has just passed away. Face to his grave, as he is being buried, Anne de Vierne, the wife of a magistrate, confesses to her son François that Laroche was in fact Lupin and that he is his natural child. But he is not the gentleman thief's only offspring! Lupin had indeed another son by a housemaid, Gérard Dagmar, a dancer, magician and - occasionally - burglar. Which complicates the task of François who, to respect the last wishes of the testator, has gone in search of the treasure of Poldavia. For he keeps finding Gérard on his way and his efforts are constantly thwarted by his half-brother. Will Gérard prevent François from becoming the worthy successor to their father or will the two young men decide to join forces? That is the question.

Murderous foreign agents are after a scientist who has invented an atomic engine that could change the future of rocketry.

Sénéchal, an actor touring the provinces with the "Tournées Carlini" does not meet the success he thinks he deserves. One night in Dreux, he finds himself without his luggage and dressed up as a Foreign Legion officer, he is invited to a party thrown by a colonel. He creates a sensation there and does not leave the colonel's wife ... indifferent! Back in Paris, Sénéchal goes through a similar experience. This time around, wearing tuxedo and top hat, he gets mistaken for a diplomat and charms the guests of a wedding party. Arrested by the police, he chooses to do without an attorney at his trial and his brilliant eloquence has him acquitted. A question remains unanswered though : will all those people who give an ovation in real life ever go to see him on stage ?

The blueprints of an aeroplane built from an ultra-secret metal are stolen from national security. French secret service agent Walder believes that the documents are now in Switzerland, in the hands of a man named Lindbaum. The latter agrees to hand over the blueprints in return for a large sum of money. Another agent, Francis Coplan, is sent to Switzerland to handle the deal, but Lindbaum only has half of the documents because he was double-crossed by Kalpannen, an international crook. With the help of Heidi, a Swiss correspondent, Coplan sets out to identify the members of Kalpannen’s gang, only to find that they have all been murdered…

Industrialist Pierre Verdier kills his mistress Jeanne Ancelin by throwing her off a train. Her husband, Ancelin, decides to take revenge on his wife's murderer, who has been acquitted by justice.