Zombies, demons, and a crazy doctor are waiting for a truckload of people to find Aztec ruins. Father O'Sullivan is a Catholic priest who has lost his faith in God and cannot forget the nun who had an extramarital affair (and a son) with him. O'Sullivan is archaeological student Carl, New Age Wilbur and Clarice Leming, Laurie, who ran away from home, and tourists Duzos and Frost served as tour guides during a bus trip to Mexico. O'Sullivan was even more surprised when his lover, Tessie, got on the bus with her son, Evan. In Mexico, Carr revealed his knowledge of an important ancient text, just in time for the death celebration. At the same time, the evil Dr. Um-tzec is planning a deification for himself, eventually becoming the god of death, and what he needs to do is to sacrifice the hearts of the children. A lot of hearts. When Father O'Sullivan struggled to see Tessie again, Dr. Um-tzec approached him for an exorcism; but. .