Six people travel by overnight train from Marseilles to Paris. When they arrive, one of them, a young woman, is found dead in a sleeping berth. The police, led by Inspector Grazzi, investigate the other five passengers, suspecting that one among them was responsible. However, as the investigation is stepped up, the others start turning up dead. It's up to the remaining two to solve the case, lest they become the next victims.

Françoise looks like a sexy kitten by day, but is a silent she-wolf by night, making very clever robberies of gold jewels. Despite the interest, and competition, from Bruno, she ends a lonely she-wolf.

Françoise looks like a sexy kitten by day, but is a silent she-wolf by night, making very clever robberies of gold jewels. Despite the interest, and competition, from Bruno, she ends a lonely she-wolf.

An art dealer in dire straits, after being ripped off by two crooks, one of whom owns a genuine painting by Gauguin while the other is an expert copyist, finds them again and, instead of killing them as he originally intended, joins in their game – with ultimately disastrous results.

Tutu is a small boy who lives with his grandmother in a working class neighborhood in Paris. Often punished by this bitter woman, eager for affection, he is seduced by a young neighbour. One day he steals a seashell for her. His life is turned upside down.

Longtime friends Guarrigue and Sénanques own a successful law practice in Paris. The dreaded businessman Pervillard is one of their clients. One night, Sénanques, who is in an unhappy relationship, meets Sacha. For her sake, he causes a political scandal involving Pervillard and puts himself in danger.

In Paris, under the Restoration, Julie de Chaverny, a young woman admired and envied by all, has been suffering for six years from an unhappy marriage to her husband, M. de Chaverny. She finally gives in to the advances of a young man she's known since childhood, deciding at last to live her own life. She wants to run away with him, but discovers it's only a passing fancy. Feeling disgraced and laughed at, she sets off for Nice to join her mother.

Thia and Murelli, who live from car stunt shows, make ends meet by carrying out small burglaries. When Murelli's daughter, whom he has tried to keep away from his business falls in love with a young thug, her father feels he must help the couple by including the young man in a heist. Their scheme misfires and forces the group to set up a jailbreak, with unfortunate results.

A self-assured businessman murders his employer, husband of his mistress, which unintentionally provokes an ill-fated chain of events.

Ben (Françoise Lebrun) is a woman who never gets to do what she really wants to do and is the victim of everybody and everything. Benedict is her imaginary creation: the girl who would respond with strength and mastery to situations she can only submit to. She is married to a cad who says he only married her because she was pregnant, and now he wants his freedom. Her real love is a fellow medical student, who shows some interest in her. Nonetheless, she remains faithful to her unenthusiastic husband, until she becomes pregnant again. At this point, she begins to act more like the Benedict of her dreams and less like the "Ben" she has lived as until now.