An inventor has just developed an extraordinary machine, a disintegrating ray and thought detector. He experiences it one evening on a group of relatives, including his fiancée, and it seems to turn into a tragedy: he is found lifeless, apparently poisoned. A man calling himself a police officer begins to investigate.
| Writing | Nino Frank | Screenplay |
| Writing | Jean Ferry | Screenplay |
| Directing | Maurice Cloche | Director |
| Sound | Georges van Parys | Music |