Brought back to life by his grandson, a diabolical scientist with an unquenchable thirst for blood goes on a rampage. A revision of the Mexican horror film LA MARCA DEL MUERTE, considerably edited and with 20 minutes of new American-made 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 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.

When chain gang prisoners attack their guards, some of the hardened criminals escape Brazil's infamous Anchieta Prison amidst all the pick-ax carnage. The government dispatches a machine-gun squad to round up the fugitives, who have fled by foot and boat and now have begun to turn on each other.

After a herd of reindeer are mysteriously found dead following a meteor crash in a remote part of Lapland in northern Sweden, soldiers and a geologist are called out to investigate.