Commander d'Espinac is found murdered. Having argued the day before the murder with Captain Bruchot, he is accused. The captain will have to conduct his own investigation if he wants to clear himself. His suspicions will fall on one of the three officers attached to his unit.
| Actor | Role |
|---|---|
 Victor Francenle capitaine Bruchot | le capitaine Bruchot |
 Jacques Baumerle commissaire Finois | le commissaire Finois |
 Fernand Fabrele commandant d'Espinac | le commandant d'Espinac |
 Véra KorèneAnna Bruchot | Anna Bruchot |
 Henri Guisolle lieutenant Capelle | le lieutenant Capelle |
 Georges Spanellyl'inspecteur Lennard | l'inspecteur Lennard |
 Pierre Magnierle colonel | le colonel |
 Jacques Vitryle magistrat | le magistrat |
 Jacques Berliozle commandant Malatre | le commandant Malatre |
 Maxime Fabertl'armurier | l'armurier |
 Jean Daurandun soldat | un soldat |
| RRobert Sellerle médecin légiste | le médecin légiste |
 Bernard BlierNot listed | Not listed |
| MMarcel VidalNot listed | Not listed |
 Geymond VitalLieutenant Le Guenn | Lieutenant Le Guenn |
 Rolla NormanNot listed | Not listed |
| AAlbert WeissLieutenant Kuntz (uncredited) | Lieutenant Kuntz (uncredited) |
 Janine Darcey(uncredited) | (uncredited) |