A group of rich businessmen and military officers who are partying in an old castle are spared when a nuclear war ravages the earth. When they venture out into the nearest town to search for food and supplies, they find most of the residents blinded, and soon they discover the existence of a sinister group called The People Who Own The Dark.
| Production | Salvadore Romero | Producer |
| Directing | León Klimovsky | Director |
| Writing | Vicente Aranda | Screenplay |
| Writing | Joaquim Jordà i Català | Screenplay |
| Writing | Gabriel Moreno Burgos | Screenplay |
| Production | José Luis Renedo | Producer |
| Camera | Miguel Fernández Mila | Director of Photography |
| Editing | Soledad López | Editor |
| Writing | Gabriel Moreno Burgos | Story |
| Art | Juan Alonso | Art Direction |
| Art | Tony Pueo | Art Direction |
| Art | José Algueró | Set Decoration |
| Sound | Miguel Asins Arbó | Original Music Composer |
| Costume & Make-Up | Mercedes de Segovia | Costume Design |
