The arrival of an amnesiac patient in a psychiatric hospital somehow frees a mad doctor, who was shot and entombed with his fiendish experiments in an abandoned wing of the asylum 20 years before.

A renegade doctor is shot dead and entombed with his fiendish experiments in the basement of an abandoned wing of a mental hospital. Twenty years later, a mysterious woman is admitted with amnesia, and her arrival is marked by an earthquake - which cracks the seal to the Dead Pit, freeing the evil doctor to continue his work.—Brian J. Wright <[email protected]>