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.

• Agrupación de Técnicos Cinematografistas de Cuba
• Azteca Films
• Joaquín Cordero
• Gina Romand
• Enrique Zambrano
• Jorge Marx
• Fernando Osés
• Juanito Tremble
• Carlos Orihuela
• Mario Texas