Henchmen of the dictator from a South American country blackmail Nick Thomas into being a government spy. The former smuggler is to pose as a priest and enter a monastery thought to be sympathetic with rebel guerrillas. The release of the film coincided with real-life events, as Catholic priests continued to be the victims of government persecution throughout Latin America.
| Actor | Role |
|---|---|
 Ian HendryThomas Nick | Thomas Nick |
 Lautaro MurúaNot listed | Not listed |
 Graciela BorgesNot listed | Not listed |
 Maurice EvansNot listed | Not listed |
 Enrique LuceroNot listed | Not listed |
| EEsther SandovalNot listed | Not listed |
 José de San AntónNot listed | Not listed |
 Héctor PellegriniNot listed | Not listed |
 Sergio RenánNot listed | Not listed |
 Edmundo Rivera ÁlvarezNot listed | Not listed |
 Arturo CorreaNot listed | Not listed |
| LLeopoldo LavanderoNot listed | Not listed |
| LLuis LucioNot listed | Not listed |
| RRafi MuñozNot listed | Not listed |
| VVictor Moreno HernandezNot listed | Not listed |
| AArt MerrilNot listed | Not listed |
| RRaul Alejandro GonzalezNot listed | Not listed |
| PPedro SalazarNot listed | Not listed |
 Walter RodríguezNot listed | Not listed |
| EElsa SanchezNot listed | Not listed |
| PPedro SantallaNot listed | Not listed |
| RRay Millán ReyesNot listed | Not listed |
| SSilvia del VillarNot listed | Not listed |
| EErivan R. MoralesNot listed | Not listed |
| AAdela VillamilNot listed | Not listed |