Bounty hunter Luke Welsh arrives looking for a wanted man. When that man draws on him he has to kill him. To collect his reward he needs a statement identifying him. But the man was well liked in town and no one will sign such a statement. When he outdraws another man who thought he was faster, some townsmen decide he should be killed and they organize a mob to go after him.

Demonstrating that a little knowledge is a dangerous thing, a convicted strangler studies the paranormal and finds a way to render himself invisible. Once he escapes, he sets out to find and eliminate five women who remind him of the mother he murdered. A police lieutenant sets out to safeguard them and bring the invisible killer to justice.