Two friends, Tricoche and Cacolet, are partners in a detective agency. Chance has it that Cacolet is hired by Van der Pouf, a rich banker who wants him to watch over his wife Bernardine while the latter, on her part, seeks the services of Thicoche.

Good-natured and devout, a French house painter takes the train to Rome, where he has decided to go on a pilgrimage. There he meets a scatterbrained dresser who has been assigned by a music hall star to bring her the gown she is to wear on stage. The two men get stolen by Cleo, a charming thief. Once in Rome, the painter finds himself penniless and the dresser without the gown...

Hélène and François are a perfect couple happily married for twelve years. But Hélène discovers psychoanalysis via a very handsome Dr. Kougloff, and he convinces her that the apparent well-balanced nature of her husband is in fact a cover for horrible tragedies.

Following a broadcast on the radio, each of the listeners remembers these "little nothings" (the title is borrowed from a play by Mozart), which have often changed their lives. Each of these stories told will prove that a tiny detail in life can change an entire destiny.

Fernandel plays Albert, the unhappy brunt of jokes by his fellow office-workers who goes from the frying pan into the fire. Albert gets caught up in a robbery that also goes from bad to worse when it leads to several murders. Although he is not a killer and essentially innocent, there does not seem to be very much that Albert can do to convince others of the truth.

A man assists his gravely ill wife to die and wants to face justice for this, but his brothers try everything to keep the family's name clean.

Désiré Le Sec has just won the "amateur policeman contest" and he is so glad he 's telling all the people around.He is an insure agent ,and his boss,his uncle,is annoyed :a man took out a big life insurance and died soon afterward.

Guillaume Dodut is a stationmaster in rural France at a station where trains no longer stop. His dream has always been to holiday in the famous resort town of Biarritz. Meanwhile, he gets involved in the romantic life of his son who is studying to be an engineer in London.

Auguste, a somewhat simple-minded Provençal fisherman, loves and admires Mireille. This concerns only Maurice, son of an important wholesaler, whom scruples do not stifle. Seduced and abandoned, Mireille moves Auguste who tries to mend his poor happiness. The local priest, with wise words, leads Mireille to offer her hand to Auguste.

Hercule, a young peasant, inherits a Parisian newspaper with a large circulation. The editor-in-chief, Vasco, takes advantage of his ignorance to make corruption prevail. But Hercules gradually realizes the role that we make him play.

A young man is hit by a car on a zebra crossing. The pretty driver drives him home, takes care of him and falls in love with him. She has a fat, selfish, boorish husband whom she abandons to her imaginary illnesses to marry her nice wounded man.

For 25 years now, under the Provence sun, Antonin, a farmhand, has shared his work and everyday life with a horse named Ulysse. What a shock when Pascal, the farmer, tells him he has decided to sell Ulysse to a picador for being too old. Not only will he be separated from his faithful companion, but he is well aware too that the arenas of Arles mean death for Ulysse. Being unable to stand such injustice, Antonin runs away from the farm in the company of Ulysse. Together, they go through the Lubéron, the Baux de Provence, the Alpilles, the Crau and the Vaccarès. Yet, their journey is no pleasure cruise, specially when it comes to crossing National Road 7. After a visit to Marcellin, an old friend of his, Antonin sets off again with Ulysse, this time towards the Rhône River.