After being thrown out of medical school for ethical violations, Dr. Peter Blood returns home to a small Cornish village, where he sets up a research laboratory in a secluded cave. There, he attempts to revive the dead, using kidnapped humans -- who he views as unworthy of life -- for their body parts, specifically, their hearts.
An American veteran returns to England after WWII to learn that his London lover has become involved with a dangerous spy ring and their search for a limping sniper.
Police find that everyone had a motive for the murder of a wealthy woman.
