Agent Joaquin recalls his latest mission while lying wounded in an ambulance: Joaquin has infiltrated into a band of smugglers. When the villains learn the truth about him, they kidnap Jouqin's fiancee. Santo comes to her rescue and fights the band.

Action, Adventure, Mystery

Joaquín Cordero, Jorge Marx, El Santo, Gina Romand, Fernando Osés, Enrique Zambrano