A mad doctor uses patients at his isolated psychiatric institute as subjects in his attempts to create longevity by surgically installing an artificial gland in their skulls.

John Carradineas Dr. Charles Conway
Myron Healeyas Mark Houston
Allison Hayesas Grace Thomas
Marilyn Buferdas Dr. Sharon Gilchrist
Tor Johnsonas Lobo
Arthur Batanidesas Danny Green
Sally Toddas Natalie Andries
Roy Gordonas Dr. Loren Wright
Guy Prescottas Police Captain George Reagan