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