An ex-con, on parole and trying to straighten his life out, decides to resume his boxing career when one of his prison enemies escapes and kills his girlfriend.

Petey Wheatstraw is a candidate to become the devil's son-in-law. The storyline is a scaffolding on which Rudy Ray Moore's standup humor can be unfolded. Beginning life as the afterbirth to a watermelon, the young Wheatstraw becomes a martial artist, but is unable to best the evil comedy team of Leroy and Skillet, who also indulge in wholesale murder. Satan restores the comedians' victims to life, and charges Petey with the task of marrying his clock-stoppingly ugly daughter to give him a grandchild. When Petey attempts to default on the deal, he is pursued by the devil's henchmen.