THE BRAIN THAT WOULDN'T DIE

Dr. Bill Cortner saves a patient who had been pronounced dead, but the senior surgeon, Bill's father, condemns his son's unorthodox methods and theories of transplanting.

While driving to his family's country house, Bill and his beautiful fiancée Jan Compton become involved in a car accident that decapitates her. Bill recovers her severed head and rushes to his country house basement laboratory. He and his disabled assistant Kurt revive the head in a liquid-filled tray. But Jan's new existence is agony, and she begs Bill to let her die. He ignores her pleas, and she grows to resent him.

Bill decides to commit murder to obtain a body for Jan. He hunts for a suitable specimen at a burlesque nightclub, on the streets, and at a beauty contest. Jan begins communicating telepathically with a hideous mutant, an experiment gone wrong, locked in a laboratory cell. When Kurt leaves a hatch in the cell door unlocked, the monster grabs and tears off Kurt's arm. Kurt dies from his injuries.

Bill lures an old girlfriend, figure model Doris Powell, to his house, promising to study her scarred face for plastic surgery. He drugs her and carries her to the laboratory. Jan protests Bill's plan to transplant her head onto Doris's body. He tapes Jan's mouth shut.

When Bill goes to quiet the monster, it grabs Bill through the hatch and breaks the door from its hinges. Their struggles set the laboratory ablaze. The monster, a seven-foot giant with a horribly deformed head, bites a chunk from Bill's right cheek. Bill dies, and the monster carries the unconscious Doris to safety. As the lab goes up in flames, Jan says "I told you to let me die". The screen goes black, followed by Jan's maniacal cackle, welcoming her long-awaited death.

The laboratory is set on fire during a struggle; the mutant kills Bill and rescues Doris, while Jan welcomes her own death as the lab burns.

The ending delivers poetic justice: Bill’s obsession destroys him, while Jan, tormented by her unnatural existence, finally achieves the death she craved. The monster he created ensures that his crimes cannot continue, and the laboratory’s destruction serves as a fiery rejection of Bill’s hubristic science. Jan’s final laugh underlines both her relief and the film’s sense of macabre irony.