The formidable wrestler dons a safari hat and joins a jungle expedition into the ruins of the Opalche Indians. The colorful group of explorers includes blustery Professor Jiménez (Carlos Ancira), macho Sergio (Eric de Castillo) and an insufferably cute kid, Agapito (Jorge Guzman). While the gang is camped out one night by the fire, the professor shares with them the terrifying story of Prince Nonoc, whose love for a virgin sacrifice doomed him to an eternity of mummyhood protected by a sacred scroll. Later the trespassers press on and are soon being picked off by the skull-faced mummy, armed with a bow and arrow. (In Spanish language, with English subtitles).