A man tries to avenge the death of his sister, a gambling addict. Another man, an ex-convict who whistles when he commits a crime, is reunited with his blind mother.
| Directing | Carlos Hugo Christensen | Director |
| Writing | Alejandro Casona | Screenplay |
| Writing | Cornell Woolrich | Short Story |
| Directing | José Arturo Pimentel | Assistant Director |
| Production | Julio Ferrando | Production Director |
| Production | Ángel Zavalia | Production Manager |
| Editing | José Gallego | Editor |
| Art | Manuel Villar | Set Decoration |
| Costume & Make-Up | Blanca Benítez | Makeup Artist |
| Costume & Make-Up | Blanca Olavego | Makeup Artist |
| Production | Horacio Guevara | Production Assistant |
| Directing | Jorge Briand | Assistant Director |
| Directing | Gilberto Sierra | Assistant Director |
| Sound | Miguel Babuini | Sound Assistant |
| Sound | Víctor Bobadilla | Sound Recordist |
| Lighting | Alberto Doná | Gaffer |
| Camera | Marcelo Pais | Assistant Camera |
| Camera | Pablo Tabernero | Director of Photography |
| Sound | Julián Bautista | Original Music Composer |
| Art | Gori Muñoz | Production Design |
| Camera | Carmelo Lobótrico | Camera Operator |
| Sound | Juan M. Arechavala | Sound Engineer |
| Sound | Walter Ferazza | Sound Assistant |
| Costume & Make-Up | Jean Bart | Costume Designer |
| Costume & Make-Up | Marta Espinach | Hairstylist |
| Costume & Make-Up | Regina Pacheco | Hairstylist |
| Writing | Alejandro Casona | Dialogue |
