Elpidio Valdés returns to the Cuban countryside to fight against the Spaniards. But they have a much more dangerous enemy: the Americans, who want to take over the island at any cost. Elpidio Valdés and his comrades-in-arms will try to prevent them from achieving their goal, with machetes in hand and bullets flying. It was conceived as a series for Spanish television and later shown as a feature film under the name Más se perdió en Cuba (More Was Lost in Cuba) in Spain and Elpidio Valdés contra el águila y el león (Elpidio Valdés Against the Eagle and the Lion) in Cuba.

In this film Paul Naschy embodies the Roman general Agrippa Vipsanio in a fierce battle against the tribal leaders Cantabrians, Corocota. Fierce battles, gladiators fighting, adventure and intrigue in this film as in the Roman conquest of Hispania.