A doctor tells a newspaper editor (via flashbacks) about a research center's experiments in hypnotic regression, conducted on a young woman who describes (now in flashbacks WITHIN flashbacks) a previous incarnation among the ancient Mayans in Yucatan. Meanwhile, and somehow related, a long-haired mummy prowls 20th-century streets! "Momia Azteca" Mexi-madness collides with Jerry Warren framing scenes in this jumbled jamboree of science and the supernatural!