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.

Resurrected 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.)

A scientist experimenting with past lives finds a reincarnated Aztec who can lead him to lost treasure—and to a creature that should remain lost. (Composed of footage from two unrelated Mexican horror films, LA CASA DEL TERROR and LA MOMIA AZTECA, plus new American-made footage.)