Post Office Box 1001
Barcelona, Spain. A young man is murdered in the middle of the street in front of the police headquarters. Miguel and Marcial, two agents of the Criminal Brigade in charge of the investigation, find in the victim's room a newspaper where a cryptic classified ad appears.
Top Billed Cast
Conrado San Martín
Miguel
Elena Espejo
Carmen
Tomás Blanco
Antonio
Manuel de Juan
Marcial
Luis Pérez de León
Don Rafael
Carlos Muñoz Arosa
Rafael
Guillermo Marín
Eyewitness
Casimiro Hurtado
Pascual el Mirada
Emilio Fábregas
Police Commissioner
Eugenio Testa
Julián Azores
Marta Grau
Doña Lola
Modesto Cid
Photographer
Rafael Navarro
Prologue Narrator (voice) (uncredited)
