To conceal his nighttime infidelity from his wife Gisele, Pierre calls in a particularly shady private detective to concoct an alibi. He is introduced to a certain Robert Crémieux, who will pass himself off to Gisèle as a childhood friend with whom he spent the night until the early hours of the morning. The so-called childhood friend turns out to be a delinquent accused of burglary and rape on the very night he was supposed to be with Pierre. Pierre is immediately suspected of being his accomplice and, trapped by his own turpitude, arrested. Entangled in his lies and denials, he has to admit his infidelity to get out of the impasse.

Mario is a former gangster turned garage owner. His former accomplices ask him to murder Magali, their leader 's mistress,who intends to turn her lover in.

La Hurlette and Carmen are a pair of philosophical tramps who enjoy simple pleasures in the company of the cheerful Sosthène. As in the fairy tales, La Hurlette learns that he has just inherited a tidy fortune, provided he can find a job. By dint of hard work, he manages to do so, and a banquet brings together his disinherited friends. Determined to live the high life, La Hurlette and Carmen lose all their inheritance at the Cabourg casino, and end up as philosophical as ever on their favorite bench.

Author of the best-selling crime novel Le Poulet se mange froid (Chicken Eats Cold) under the pseudonym Sam O'Connor, Inspector Bourdieux's daughter, Agnès, is unwillingly drawn into the gangster ring by two small-minded young misfits, Dédé and Juju. She's not insensitive to the charms of M. Paul, a false kingpin who is in fact a son of a good family and a thrill-seeker. Planning a heist at the home of one of Paul's snobbish friends, she arrests the real Sam O'Connor, an escaped convict, with the help of her father. Then she and Paul confess their love for each other.

Christine, the daughter of a rich American, acquires from her father the jazz band of Ray Ventura who will be made responsible for accompanying her from morning till evening wherever she goes. From an endless number of amusing situations, the fiancée of the girl despairs. But soon the musicians rebel in in the face of the requirements of their patroness. More than a job, it is for them misery. Christine excuses them and she goes back to America with her band. Things go bad, degenerate, but the kindness of the musicians and the firmness of the fiancée of Christine really quiet down the moods of the young woman .

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 ?