With the help of journalist Diane Castelain, Parisian police inspectors Leo Gorce and Gu Arenas are trying to solve the murder of a member of the French Parliament, but some dangerous powerful people try to make sure that doesn't happen.
| Actor | Role |
|---|---|
 Gérard LanvinInspector Gu Arenas | Inspector Gu Arenas |
 Eddy MitchellInspector Léo Gorce | Inspector Léo Gorce |
 Françoise ArnoulDiane Castelain | Diane Castelain |
 Raymond PellegrinSissia Carpelli | Sissia Carpelli |
 Lisette MalidorMara | Mara |
 Eva HarlingKim | Kim |
 Amélie PrévostChristine | Christine |
 Lucas BelvauxLaurent | Laurent |
 Pierre LondicheRaoul Favreau | Raoul Favreau |
 Jean-Claude BouillaudJérôme Martineau | Jérôme Martineau |
 Roland AmstutzCommissioner Verdier | Commissioner Verdier |
 Michèle SandCabinet attaché | Cabinet attaché |
 Marc ChapiteauDidier Permejat | Didier Permejat |
 Louis NavarreBruno Lahire | Bruno Lahire |
 Marc de JongeRoland Bauchaud | Roland Bauchaud |
 Steve KalfaLuc Marastrat | Luc Marastrat |
 Patricia MillardetJoséphine | Joséphine |
| DDavid JalilGypsy | Gypsy |
| PPierre IvanoffInspector Collard | Inspector Collard |
 Jean-Pierre MaurinInspector Tessier | Inspector Tessier |
 Vernon DobtcheffJames | James |
 Caroline LaurenceNot listed | Not listed |