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.
Miguel
Carmen
Antonio
Marcial
Don Rafael
Rafael
Eyewitness
Pascual el Mirada
Police Commissioner
Julián Azores
Doña Lola
Postmaster
Photographer
Prologue Narrator (voice) (uncredited)
Policía
Vendedor de periódicos
