A horrific and, on the face of it, incomprehensible murder has just been committed on the unsympathetic person of a loan shark. The victim's body is found lifeless, but the circumstances of his death are far from clear. For want of anything better to go on, the police immediately suspect a penniless gentleman who had the bad idea and misfortune to be present at the time of the crime. The police don't take the time to look for other possible suspects, and are not at the end of their surprises. A dark story seems to lie behind this imbroglio of incoherent facts.

In Montmartre, prostitutes and neighborhood pimps meet in Victor's bar. One of them, Charly, one day falls in love with the beautiful Laurence, a girl who honestly earns her life as a singer. But Fernand, the local boss, sees a bad eye his acolyte out of the ranks to lead a quiet life in the company of his sweetheart. He provokes the jealousy of Jessy, mistress of Charly. The latter, stung, does not intend to leave without fighting his lover take the tangent. She ruminates her revenge so much that she ends up shooting Charly ...

In the Canadian Far North, a couple is looking for a gold mine. They meet a sergeant and his friend. But the man is killed during a fight with an adventurer.

A French squadron of camel drivers pursues a group of looters across the Sahara Desert. After experiencing heat, fever, and peril, the squadron finds the looters, but also lose their captain. The lieutenant takes command, leading the remaining men of the squadron back across the desert to their fort.

In his younger days, a dashing officer, Colonel Durand, compromised Madame De Monthieux, who entered a convent. Now, he is garrisoned at Strasbourg.

La Carcasse, an obtuse peasant, lives with his wife Lucie and his father-in-law Tord-cou. At odds with his son-in-law, the Tord-cou takes it into his head to marry Thérésa, the daughter of their neighbor Casimir. But the Carcass, too, feels attracted to the young woman...

Georges, hunted by the Germans, had taken refuge with his brother, Commissioner PJ Paris. Once released, he teams up for the sake of a girl with the lackluster Zattore. A bank is robbed, but the police is fast and Georges will either lose his life.

Captain Palmer's daughter, Maria, is neglected by her husband, the cynical Leo, who lives with the beautiful Sylvia. To defeat his son-in-law, Palmer has the idea of ​​putting Sylvia back in the presence of Pierre, her first love. Leo takes revenge by creating many difficulties for Palmer who retaliates by starting a violent fight where Leo is killed. Everything seems to point to Pierre, but...

In Central Europe, resistance to the Germans in growing. But the partisan leader is denounced and killed. His daughter and the son of the traitor love each other. Condemned by his comrades, the informer commits suicide in front of the young couple.

Fabienne believes herself to be cheated on by her husband Claude and divorces her. He leaves for America and does not return until eight years later. He then meets his daughter.