In Paris , Commissioner Stan Jalard and Inspector Simon Lecache plan to quit the police to go and enjoy a more peaceful life in the West Indies. In a nightclub, during a routine visit, they spot Schneider, a dreaded gangster and public enemy. At the time of his arrest, Simon is killed at close range by the criminal. Stan then decides to stay in the police to avenge Simon. Being the godfather of Christian, Simon's son, who sometimes lives in a boarding school, sometimes at home, he takes charge of his education. Two years later, Stan has been promoted, and he's told that Schneider had resurfaced in the capital. A long hunt begins.
| Directing | Jacques Deray | Director |
| Writing | Jacques Deray | Screenplay |
| Writing | Simon Michaël | Screenplay |
| Writing | Simon Michaël | Dialogue |
| Writing | Alphonse Boudard | Dialogue |
| Writing | Daniel Saint-Hamont | Dialogue |
| Production | Jean-Paul Belmondo | Producer |
| Production | Alain Sarde | Producer |
| Sound | Danny Schogger | Original Music Composer |
| Camera | Jean-François Robin | Director of Photography |
| Editing | Henri Lanoë | Editor |
| Art | Jean-Claude Gallouin | Production Design |
| Art | Gérard James | Set Decoration |
| Costume & Make-Up | Paulette Breil | Costume Design |
| Costume & Make-Up | Pascale Bezon | Makeup Artist |
| Costume & Make-Up | Charly Koubesserian | Makeup Artist |
| Costume & Make-Up | Jacques Leymond | Hairstylist |
| Costume & Make-Up | Jacqueline Stuffel | Hairstylist |
| Crew | Paul Trielli | Special Effects |