Anthology film with three shorts each featuring a famous detective: Monsieur Wens, Lemmy Caution and Maigret.

Madame Célerier is determined to marry off her son François to a rich and haughty woman but François has other plans.

Father Benoît would like one of his twins to take over his inn, at 3 plates. But his ancillary ambitions are not commensurate with his last 3. Bernard is also in love with Hélène, daughter of Colonel Flouc de La Donzelle. He dreams of becoming an actor and goes to Paris to find a job. Difficult beginnings since from the theater, he goes to the cabaret, then to the radio, without success. In the final scene, the 3 brothers meet, which gives rise to a series of gags during the wedding.

The love of a singer and his mistress suffers a setback.

Robert Montfort, happily married to Solange, is his parents-in-law's pet aversion though. To them he is a punk, a good for nothing, a small-time, untalented poet! Robert, who is more gifted than what they think, manages, following a workmate's recommendation, to debut as an entertainer in a nightclub and -even better- to please the audience. Not daring tell the truth to Solange he starts leading a double life, being Robert Montfort in the daytime and Jean Rigobert at night. Of course his wife wonders what is going on and worries about his regular night outings. Only too happy, her parents incite her to have a divorce. Fortunately, all comes right in the end.

Catherine, 18, loved Jean, a young accountant, who loved her in return. And yet, one morning, two policemen find their dead bodies on a stretch of waste ground. The case is obvious: the two young people have killed themselves. But why? Chief Inspector Ernest Plonche, feeling upset, decides to investigate personally.

After an accident, Raymond has gone blind. His family treats him like a child, but fortunately a nun comes to his rescue. She works in a center where blind people learn to read using the Braille alphabet.

A couple of dancers performs in a night club. The man is jealous of Gina, his partner,and keeps making scenes to her, going as far as bullying her on the stage during their act. A man gets killed. The dancer is suspected for being jealous of all the other men. Another potential culprit could the father of Gina since he overprotected his daughter. The real culprit will be unmasked after the police detective finds the murder has something to with the Occupation period.

Irène is the unhappy wife of a wealthy publisher, Jacques Voisin-Larive, who cares about her no more than a beautiful piece of furniture. Her meeting with Étienne, a young cabinetmaker with whom she falls in love, turns her dismal existence upside down. Not wanting to reveal her condition to her lover, she pretends to be a modest maid, employed by the Voisin-Larive. At the end of a weekend spent with her lover, Irène discovers that she is pregnant. The fragile balance of their existence is suddenly broken. Taking the initiative, she reveals her affair to Jacques and tells him about her desire to divorce. But her husband has no intention of giving her back her freedom...

1948. Madeleine is the headmistress of a kindergarten in Ménilmontant. Dr Libois, the school doctor, is very close to her heart. When Rose, a new helper comes to the school, Libois is impressed at once by her understanding of the little ones and her dedication to them. Little by little, Libois grows fond of Rose while becoming estranged from Madeleine. He eventually marries Rose.