The Satans, a sadistic biker gang led by Anchor, go to a diner in the middle of the California desert where they terrorize owner Lew, waitress Tracy, and the patrons. One patron manages to escape, and must reach a town before the Satans catch up to and kill them.

A magician in a carnival--who actually can read minds and levitate people and objects--works with a superintelligent chimp named Alex, who can also talk. The magician and the chimp soon become the stars of the carnival, drawing in big crowds. However, the wild-animal trainer, who has been displaced by the team as the carnival's top act, decides to kidnap Alex and sell him to a medical laboratory for experimentation, thereby getting rid of his competition.