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.
| Directing | Enrique López Eguiluz | Director |
| Writing | Juan Logar | Screenplay |
| Camera | Raúl Artigot | Director of Photography |
| Sound | Juan Logar | Original Music Composer |
| Editing | Juan Pisón | Editor |
| Art | Teddy Villalba | Set Decoration |
| Costume & Make-Up | Manuel Martín | Key Makeup Artist |
| Costume & Make-Up | Manuel Novoa | Assistant Makeup Artist |
| Production | Enrique Cabeza | Production Manager |
| Directing | Joaquín Palomares | Assistant Director |
| Art | Félix Corella | Property Master |
| Camera | César Benítez | Still Photographer |
| Camera | Francisco Gómez Conde | Camera Operator |
| Camera | Fernando Navarro | Assistant Camera |
| Editing | Sebastián Herranz | Assistant Editor |
| Directing | Paul Naschy | Script Supervisor |
| Production | Francisco García Gárgoles | Production Assistant |
