Andrés, an unsuccessful young pianist, witnesses a murder; but keeps silent for fear that the man he has seen next to the corpse will retaliate against him.
| Actor | Role |
|---|---|
 Susana CamposLaura | Laura |
 Carlos EstradaAndrés Salas | Andrés Salas |
 Antonio CasasComisario Ruiz | Comisario Ruiz |
 José María PradaDon Sixto | Don Sixto |
| PPaul EslhemanClaus Hans | Claus Hans |
 Alfonso RojasAntonio | Antonio |
 José MarcoInspector Vázquez | Inspector Vázquez |
 Emilio RodríguezJulio Cuétar | Julio Cuétar |