Anxious and shy, Michaud works for a company that specializes in alarms, safes and other security devices.
| Actor | Role |
|---|---|
 Michel SerraultMichaud | Michaud |
 Guy MarchandLambert | Lambert |
 Pierre ArditiJean-Hugues Aymeric | Jean-Hugues Aymeric |
 Jean-Pierre BacriDesfontaines | Desfontaines |
 Bernard Fressoncommissaire Maréchal | commissaire Maréchal |
| TThierry ReyTony Caraco, le voyou | Tony Caraco, le voyou |
 Geneviève FontanelJacqueline Michaud | Jacqueline Michaud |
 Bernard Hallerle serveur de la brasserie | le serveur de la brasserie |
 Evelyne BuyleLily | Lily |
 Henri CourseauxBaudu | Baudu |
 Hubert DeschampsMr Robert | Mr Robert |
 Muriel RobinMademoiselle Champion | Mademoiselle Champion |
 Delphine ForestNatacha Michaud | Natacha Michaud |
 Olga Baïdar-PoliakoffTante Olga | Tante Olga |