Post Office Box 1001
1950
Drama, Thriller | 05 December 1950
Conrado San Martín, Elena Espejo, Tomás Blanco
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.