King Amir (Reed Hadley), the beloved leader of a small Middle Eastern country named Khaleed, is sick with terminal cancer and he isn't prepared to die.
His confidants arrange with an American scientist to carry out an experimental operation: Amir's brain will be transplanted into the skull of a healthy new body, allowing him to cheat death and continue ruling as a benevolent despot.
When he succumbs, the corpse is rushed to the United States, where Dr. Trenton (Kent Taylor) immediately removes the brain and places it in a specially prepared receptacle.
Trenton sends Amir's associates away so he can finish the procedure, but as they drive down a steep mountain road, their car is besieged by a menacing driver who succeeds in forcing them off a cliff. Robert (Grant Williams) survives, and suspects that someone is trying to usurp Amir's throne.
Meanwhile, the mad doctor dispatches his servant Gor (John Bloom) to find him a healthy male body for Amir to inhabit. Gor, a hulking monstrosity with a twisted face and a child's intelligence, is too clumsy in his horrible task, and Dr. Trenton deems the victim unusable.
But Amir's brain can only live outside of the body for a matter of hours, even though they keep it nourished with plenty of fresh human blood (obtained by keeping some teenage girls chained in the basement and tapping them like kegs).
Gor is picked to host the transplanted brain, despite his hideous scars, and when Amir awakens and discovers the horrific body the doctor has given him, he goes mad. Robert returns to save his leader, but now Dr. Trenton is demanding control over Khaleed, and special electrodes he secretly implanted in Amir's brain mean he might succeed.
Directed by Al Adamson, this gory shocker features Adamson regulars like Zandor Vorkov, Angelo Rossitto, and Regina Carrol.