After the failure of his recent criminal exploits, international con artist Alexandre Dupré sets off for Venice to try to dupe some Japanese business men into buying a fake copy of a stolen Caneletto. On the aeroplane, a stranger asks him to look after his briefcase until after they have landed. Alexandre agrees, but the stranger is shot dead soon after and Alexandre himself becomes the target of enemy agents who are keen to recover the briefcase...

Playwright Charles Watson entertains his niece Lily by telling her about the adventures of Philibert.Both these people have something to do with Philibert.

Gaston is in love with Brigitte, daughter of the Baroness, who claims to have a lover. Gaston sets off for Paris, with 300,000 francs borrowed from the Baroness, to find his rival. He is robbed and forced to work in cabarets, where his father, his fiancée and the Baroness, not to mention the Curé, come looking for him. All ends well.

Returning from South America, a singer is hired by an old pal who runs a detective agency to use a perch as a night club performer to be an investigator.The amateur sleuth then falls for a girl whose brother is a jewel thief.

Alex Grégoire is a timid insurance company clerk who shares his uneventful life between his wife Angèle, his colleagues and his passion for crosswords. But all of a sudden his existence changes dramatically. First because he wins a crossword competition. Second because a jewel thief, Charles Tuffal, thinks he recognizes in him a former accomplice. From that moment "uneventful" is not the best adjective to qualify Alex's life anymore...