Brenda (Blair) is a rough-hewn teenager from the mean streets of L.A. But beneath her cold exterior, she dotes on her deaf-mute kid sister Heather (Linnea Quigley). When a prank against a gang of drug-dealing punks goes sour, Heather and Brenda's best friend Francine pay the price. Out for revenge, Brenda delivers her own brand of justice against the thugs.