By chance, writer Eddie Ross comes to the aid of a young woman on the street, a good deed that lands him a job with a strange underground character known only as Martínez.
| Actor | Role |
|---|---|
 Eddie ConstantineEddie Ross | Eddie Ross |
 Elisa MontésNot listed | Not listed |
 José María Nieto RoaNot listed | Not listed |
 Silvia SolarNot listed | Not listed |
 Henri CoganNot listed | Not listed |
 Jacinto San EmeterioNot listed | Not listed |
 Adriano DomínguezNot listed | Not listed |
 José VillasanteNot listed | Not listed |
 Carmen PorcelNot listed | Not listed |
 Carlota BilbaoNot listed | Not listed |
 María SilvaNot listed | Not listed |
 Mayra ReyNot listed | Not listed |