Andrés, son of a famous pianist, discovers the corpse of a tuner killed in his shop, located in the basement of his house. Then a suspect leaves, but in the fear of possible reprisals he doesn't tell anything to the police, only to his wife Laura. From that moment on, Andrés feels threatened and persecuted.
| Directing | José Luis Borau | Director |
| Writing | Juan Miguel Lamet | Screenplay |
| Writing | Juan Miguel Lamet | Story |
| Writing | Rodrigo Rivero Balestia | Screenplay |
| Production | Ramiro Gómez Bermúdez de Castro | Executive Producer |
| Sound | Luis de Pablo | Original Music Composer |
| Crew | Enrique Torán | Cinematography |
| Editing | Pedro del Rey | Editor |
| Art | Antonio Simont | Set Decoration |