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.

For the centenary of Cuban patriot Jose Marti, the 1950s pre-Castro dictator Batista collected funds for an official film commemoration and hired renowned director Fernandez from Mexico to erect this memorial work.