As novice detectives, Bud and Lou come face to face with the Invisible Man.
One evening, Hammer gives a ride to Christina, an attractive hitchhiker on a lonely country road, who has escaped from the nearby lunatic asylum. Thugs waylay them and force his car to crash. When Hammer returns to semi-consciousness, he hears Christina being tortured until she dies. Hammer, both for vengeance and in hopes that "something big" is behind it all, decides to pursue the case.
An unscrupulous boxer fights his way to the top, but eventually alienates all of the people who helped him on the way up.
