Captain Gringo in a gunman's graveyard in Guatamala!The curvaceous blonde twins named Flora and Dora need a troubleshooter to "shoot some trouble." Gringo's their man—in more ways that one—only now these two luscious lovelies have got him trapped between the Mexican army on one side and the black-hearted rebel leader El Caballero Blanco on the other. But even worse, Gringo is boxed in next to a lava-spewing volcano! The molten rock is hot, all right—but not nearly so hot as the nympho nurse who really knows how to make a man's temperature rise!