When an informer is executed, his dismembered remains found in several bin bags, Fred, a resilient police inspector, leads the murder investigation with his customary dogged determination.

In this action thriller, Richard Anconina is Willie, a young and lonesome cop who loves lonesome cowboy music. While on a drug case Willie comes across a mulatta named Jo (model Ambre of Senegalese extraction), who is trapped in a dismal life of prostitution by two abusive Lebanese brothers. Risking his own life, Willie frees Jo from their fierce imprisonment, but the battered woman runs right back again.

While watching the others on her TV screen, Louise becomes a rebellious girl.

Father Birotteau and Father Troubert, both of whom are priests at Tours, have separate lodgings in the house belonging to the crabby spinster Sophie Gamard in that city. Birotteau is an other-worldly, gentle, introspective type; Troubert, who is ten years younger than his fellow boarder, is very much of the world: he is a careerist devoured by ambition.

Camille, Dov and Joëlle live on the edge of society and are involved in petty theft helping them to buy their drug doses and to survive as best they can. One day, while attempting to rob a movie theater, they activate the alarm signal and it is Pierre, Camille's brother, who is doing a heist in the same building, who is arrested red-handed. The three young people decide to kidnap a police officer and exchange him for Pierre.

Two crooks think up a scheme to get rich at the expense of the vain and excessive Grand Duke.

Six people travel by train overnight from Marseilles to Paris. When the train arrives at its destination, one of the passengers, a girl, is found dead in a sleeping berth. The police led by Inspector Grazzi investigate the other five passengers, suspecting that one of them was responsible. However, as the investigation is stepped up, the other passengers start turning up dead. It is then up to the last remaining two to solve the case, before they become the next victims.