Motorcycle mechanic C.C. Ryder (Joe Namath) joins "The Heads," an outlaw biker gang. Fellow gang members menace fashion journalist Ann (Ann-Margret ) when her limo breaks down in the desert, but C.C. comes to her rescue. The bikers disrupt a motorcross event tied in with a fashion shoot, but C.C. enters the competition under Ann's admiring eye. His win puts him at odds with Moon, leader of "The Heads." When C.C. leaves with his cut of the purse, the bikers kidnap Ann, and C.C. races Moon to win her freedom.
C.C. Ryder--an honest grease monkey (played with "aw-shucks" good-naturedness by Joe Namath)--is thrust into the rapacious, swarthy world of hog-riding when he joins hell-bound biker gang "The Heads". Shortly after his induction into the sleazy club, he averts the gang rape of Ann McCalley (Ann-Margaret), a fashion reporter sent to cover a motor sports event. Ann and C.C. are on their way to falling madly in love, much to the chagrin of "Heads" leader, Moon (William Smith). Mayhem and an adrenaline-pumping, high-stakes race across the desert ensue.