Professor Frankenstein (Whit Bissel), a guest lecturer from England, talks Dr. Karlton (Robert Burton) into becoming an unwiling accomplice in his secret plan to actually assemble a human being from the parts of different cadavers. After recovering a body from a catastrophic automoblie wreck, Professor Frankenstein takes the body to his laboratory-morgue, where in various drawers he keeps spare parts of human beings. The Professor also enlists the aid of Margaret (Phyllis Coates), as his secretary, to keep all callers away from the laboratory.