Julien Saint Dominique, an agent of the French counter-espionage service in Berlin, investigates the kidnapping of a functionary taken by German communists into East Germany.
| Directing | Mario Maffei | Director |
| Writing | Vincenzo Mannino | Screenplay |
| Writing | Carlo Gualtieri | Screenplay |
| Writing | Albert Kantoff | Screenplay |
| Writing | Jean Laborde | Novel |
| Sound | Bruno Nicolai | Original Music Composer |
| Editing | Franco Attenni | Editor |
| Camera | Mario Fioretti | Director of Photography |
| Art | Antonio Visone | Production Design |
| Art | Nicola Tamburo | Set Decoration |
| Costume & Make-Up | Italia Scandariato | Costume Design |