In an abandoned glass factory, a woman exploits her workers, all of them mentally ill. A gang of young assailants decides to rob said factory, but in order to achieve that, they must get one of them into the woman's house first. What they do know is that Maruja, the woman's goddaughter also lives there.
| Directing | Francisco J. Lombardi | Director |
| Camera | Pili Flores-Guerra | Director of Photography |
| Writing | José Watanabe | Screenplay |
| Writing | Edgar Russo | Screenplay |
| Writing | Enrique Congrains | Original Story |
| Editing | Augusto Tamayo San Román | Editor |
| Sound | Arturo Pinto | Original Music Composer |