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