Stella Johnson is a single mother living in the town of Harper Valley. Most of the townsfolk, particularly those on the school PTA, think she is a little too liberal so they're making things tough for her and her daughter. So she runs for the position of PTA President, which infuriates them. Stella decides to get revenge with the help of her friends.

Set in the backwoods of the deep south. Young, beautiful Ellie has just witnessed the murder of her father at the hands of her evil step-mother Cora and Cora's three lecherous sons, all hoping to get their hand's on Ellie's father's money. Vowing to avenge her father's death, Ellie plots to do in the murderers using the only weapon she has: her body.

Melvin White, a neurotic, accident-prone cop who gets demoted to the night shift, secretly moonlights as the Unknown Comic, an anonymous stand-up comedian who performs with a paper bag over his head. When someone using the same guise commits a string of bar robberies in town, some begin to suspect that White is the culprit.