The story is about a lieutenant, nicknamed "the Rooster of the Regiment", a married man, who just can't help running after any woman passing around, and one of his friend, who always has "good ideas" to give him a hand to come out of "ubuesque" situations.
Anthology film with three shorts each featuring a famous detective: Monsieur Wens, Lemmy Caution and Maigret.
Albert Durandal is unable to keep a job for more than a few days. The reason: he hums while working, which invariably irritates his superiors. He is not hired as a singer for all that, as no music producer is prepared to bet on him. At the moment he is as free as a (singing) bird and accepts to take care of Josette, the little daughter of Jeanne, his neighbor, who is sick and has to go to a sanitarium. One day, while walking down the street, he helps an old man who has an attack. The latter happens to be an influential millionaire. And with a heart of gold into the bargain : he helps Albert to make it in the singing career. And as Jeanne has recovered, he can marry her and adopt Josette.
Fernand Espitalion is miserable as totally whipped husband of a dragon 'passed on' -like cloths- by his late cousin. She often leaves him waiting outside like a dog when she does business. While she sees a notary about an inheritance, he's seduced to a bar by a shady man. The rogue gets Fernand drunk, knocks him out and switches costumes and papers. He's now Robert Durand, a voluntary Foreign legion recruit. After failed attempts to explain, he tastes military life and finds it less disciplined and more enjoyable then, marriage. But will that last when his wife tracks him and his unit is sent to action in tribal Algeria?
In the Mouffetard district of Paris, Jérôme Crainquebille, an affable four-season merchant, is stopped by a police officer and taken to the station, unjustly accused of shouting "Mort aux vaches!" ("Death to the cows!"). When he returns to work after a fortnight's detention, he is ostracized by his neighbors. Lonely, Crainquebille sank into despair and alcoholism. His life in prison seemed sweeter, and his attempts to return were in vain. He owes his salvation to the affection of a local kid.
