A scientist hypnotically regresses a woman to a previous life, a Mayan princess, who leads him to a secret tomb where the princess was buried - and the mummy of an ancient warrior, cursed to live after death and guard the treasure buried with her. Edited by Jerry Warren from the Mexican horror film LA MOMIA AZTECA, and following its general plot but with 36 minutes of new, American-made footage added and English narration in lieu of dubbed dialogue for the Mexican footage.

Experimenting in hypnotic regression to past lives, Dr. Edmund Redding of the Cowan Institute in Pasadena has discovered that Ann Taylor is a reincarnated Aztec woman. Via her recovered memories, she is able to lead Redding and his associates to a hidden chamber in the Great Pyramid of Yucatan, where they hope to find the lost treasure of the Aztecs. Instead, they find two mummified bodies - one of a modern man, quite dead, and the other of an ancient Aztec, quite alive. They are able to return safely to Pasadena with both finds, but a rival professor, Janney, kills Redding and steals the body of the modern man-mummy. This he subjects to a resurrection experiment, which works - only the mummy proves to be a werewolf. Two supernatural menaces roam the city that night. This film is composed of footage from two unrelated Mexican horror movies, LA CASA DEL TERROR and LA MOMIA AZTECA, plus new footage shot in the U.S. by Jerry Warren.

A mad doctor builds a robot in order to steal a valuable Aztec treasure from a tomb guarded by a centuries old living mummy.

The evil Dr. Krupp, once again trying to get possession of the Aztec princess Xochitl's jewels, hypnotizes her current reincarnation, Flor, to get her to reveal the jewels' location - Xochitl's tomb. Confusion reigns as Krupp and his thugs are opposed by Flor's lover, Dr. Almada, his assistant, and wrestling superhero, El Angel. Krupp finally meets his match, however, when he comes up against Popoca, the warrior mummy who guards Xochitl's tomb.

A freed slave, who is descended from a murdered witch, plots revenge with her grandmother on a sugar plantation's inhabitants. Complications ensue due to her love for the master of the estate.

Thieves break into a scientist's laboratory to steal a secret formula, and in the process they kill his daughter. Enraged, he develops a formula that will turn an extremely ugly woman into a spectacular beauty, and then uses the woman to take his revenge on those responsible for his daughter's murder.