During a plane crash, Professor Sellier, an atomic scientist carrying very important documents, dies and his papers are stolen. Bordy, a sergeant in the Second Bureau, is asked to take Sellier's place in his family's home, in order to make the kidnappers believe that he is not dead.
| Actor | Role |
|---|---|
| CCatherine CandidaDenise | Denise |
 Gil DelamareColonel Bordy | Colonel Bordy |
 Colette DuvalClaire Sellier | Claire Sellier |
 Michel LemoineNot listed | Not listed |
 André LuguetLe chef de deuxième bureau | Le chef de deuxième bureau |
 Frédéric O'BradyLucien | Lucien |
 Gisèle RobertVéra | Véra |