Experimenting in hypnotic regression to past lives, Dr. Almada discovers that his fiancee, Flor, is the reincarnation of an Aztec maiden who was put to death for loving an Aztec warrior, her body placed at the entrance of a hidden chamber in the Great Pyramid of Yucatan where the treasures of the Aztecs were hidden, and her lover mummified but cursed to remain alive and guard the treasure.