A scientist discovers through hypnosis a mummy who watches over the jewels of an Aztec god for all eternity.

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