Fever Mounts at El Pao (1959)

After Caribbean despot Mariano Vargas is murdered at the hands of his enraged populace, his secretary Ramón Vázquez takes not just control but also Vargas' widow Inés, with whom he's been having an affair. Special military unit leader Alejandro Gual arrives to overthrow Vázquez by turning the people and Inés against him.