Eddie Bascomb escapes from prison and finds shelter with professor Judson Lamont. Lamont studies the evil in human nature and makes Bascomb commit crimes. When a rival of the professor is found dead, the police arrest both men.
The magician Carlton Van Dru claims to have powers of real magic. Scorned by his unbelieving colleagues, Van Dru swears revenge. One day he is found dead, but returns from the grave to taunt his fellow magicians. A police detective investigates and exposes a hoax.