Paris, in the 1960s. A series of crimes troubles the public tranquility. On March, 22, 1968, Hélène Picard, a prostitute sentenced to death two years before for several murders, is killed by executioner Louis Guilbeau. Immediately, the violent crimes, similar to Hélène’s ones, go on again. In parallel, Louis is having an affair with the police woman in charge of the investigation… What are the obscure relations hidden behind the executioner and the mysterious killer? Who is this dark man in reality?
| Actor | Role |
|---|---|
| CClaude MerlinLouis Guilbeau | Louis Guilbeau |
 Solange PradelSolange Lebas | Solange Lebas |
 Myriam MézièresSuzy, l'assistante | Suzy, l'assistante |
 Jackie RaynalAngèle | Angèle |
 Catherine DevilleBrigitte | Brigitte |
| AAlain Yves BeaujourLe père Jourbeau | Le père Jourbeau |
| VVelly BeguardCathy | Cathy |
| BBernard LetrouLe narrateur (voice) | Le narrateur (voice) |
| AAgnès BonanLa femme interviewée | La femme interviewée |
| PPaul BonanL'homme interviewé | L'homme interviewé |
| BBernard BonanL'étudiant interviewé | L'étudiant interviewé |
 Serge MoatiL'inspecteur Moati | L'inspecteur Moati |
 Jean-Denis BonanUn flic | Un flic |
| PPaul BourronLe flic tué à bout portant | Le flic tué à bout portant |
| GGilbert GibdounyLe laborantin photo | Le laborantin photo |
| AAnnie MerlinNot listed | Not listed |
| YYves TolliniNot listed | Not listed |
| DDanielle LetellierNot listed | Not listed |
 Thomas LetellierNot listed | Not listed |