A teenage boy who runs off to join the circus as a side show puppeteer stumbles onto the dark secrets of the fellow performers.

A professor stays in a mysterious castle where all kinds of strange beings live, such as the Wolf Man, the Rubber Boy, the Legless Man, the Living Torso, among others.

Hotheaded laborer B.J. Hammer can't go long without ending up in a fight, and, after he comes out on top in a particularly impressive workplace scuffle, word of his brawling skills makes its way to Davis, a top boxing manager. Hammer is hired by Davis and begins a lucrative career in the ring, only to find out that his new employer wants him to throw a fight and take part in other illicit activities. Hammer reacts to this news violently, and the feud is on.