The same day of their marriage, Jean's wife dies of a strange ailment in the middle of surgery. Afflicted by the loss, the young man abandons his medical studies and takes refuge in the memories of his time of courtship. At the same time that this happens, a wave of murders shakes the city with the same pattern of behavior: the victims are surgery students whose bodies have had both hands amputated.
| Camera | Raúl Artigot | Director of Photography |
| Directing | Enrique López Eguiluz | Director |
| Writing | Juan Logar | Screenplay |
| Sound | Juan Logar | Original Music Composer |
| Costume & Make-Up | Manuel Martín | Key Makeup Artist |
| Production | Enrique Cabeza | Production Manager |
| Art | Félix Corella | Property Master |
| Camera | César Benítez | Still Photographer |
| Camera | Fernando Navarro | Assistant Camera |
| Editing | Juan Pisón | Editor |
| Editing | Sebastián Herranz | Assistant Editor |
| Camera | Francisco Gómez Conde | Camera Operator |
| Directing | Joaquín Palomares | Assistant Director |
| Art | Teddy Villalba | Set Decoration |
| Production | Francisco García Gárgoles | Production Assistant |
| Directing | Paul Naschy | Script Supervisor |
| Costume & Make-Up | Manuel Novoa | Assistant Makeup Artist |
