A special detective is sent to Lisbon in order to investigate a series of murders. After looking into the murders, our hero realises that they are somehow linked to an illegal drug smuggling operation and so sets about looking into that in order to solve the murders and stop the smuggling from taking place.
| Writing | Alberto De Stefanis | Writer |
| Writing | Juan Bosch | Writer |
| Directing | Juan Bosch | Director |
| Sound | Marcello Giombini | Music |
| Camera | Gino Santini | Director of Photography |
| Art | Saverio D'Eugenio | Set Decoration |
| Art | José Massagué | Art Direction |
| Writing | Ángel G. Gauna | Writer |
| Writing | Anthony Steffen | Writer |
| Editing | Emilio Ortiz | Editor |
| Production | José María Cunillés | Executive Producer |
| Directing | Anna Pia Sterlicchio | Script Supervisor |
| Editing | Eugenio Alabiso | Editor |
