A group of international criminals steal a large emerald from a heavily guarded Colombian mine and they plan to sell it on the black market. Unfortunately, the evil Dr. Igor is also manipulating other criminals, as well as the ones who stole the emerald, for his own benefit. Santo, a Mexican wrestler/Interpol agent works with the Colombian authorities in an attempt to recover the emerald and to stop Dr. Igor and his subordinates, as well.
| Actor | Role |
|---|---|
 El SantoSanto | Santo |
 Mara CruzLina | Lina |
 Ángel MenéndezDoctor Igor | Doctor Igor |
 Elsa CárdenasAlicia | Alicia |
 César del CampoLt. Victor Valle | Lt. Victor Valle |
 Fernando OsésAssassin | Assassin |
 Frank BrañaMario | Mario |
 Antonio PicaIgor's Henchman | Igor's Henchman |
 'El Indio' RinconNot listed | Not listed |
| JJohana AlohaNot listed | Not listed |
| RRamiro CorsoNot listed | Not listed |
| NNelson CuéllarNot listed | Not listed |
| WWilliam GavinNot listed | Not listed |
| JJimeno GonzálezNot listed | Not listed |
| AAntonio GranadosNot listed | Not listed |
| LLuciano MerchanNot listed | Not listed |
| GGuillermo MoralesNot listed | Not listed |
| CCelia RoldanNot listed | Not listed |
| AAhona Saint MartinNot listed | Not listed |
| FFrancisco TejadaNot listed | Not listed |
| MManuel VelázquezNot listed | Not listed |