After terrorizing a convenience store salesgirl with tomatoes, three lowlifes on a crime spree hide out at an isolated farmhouse occupied only by teenage Lisa and her pathetically paralyzed grandpa. Bad move, guys, for while Lisa looks innocent enough, she's actually a ticking-time-bomb-of-psychotic-aggression who spends her days killing chickens, feeding raw eggs to her granddad, staring blankly into space, and hallucinating blood on a mirror. So when the three numbskulls add Lisa to their list of people to abuse, she promptly puts an end to their antisocial activities with the help of her two best friends, a straight-edge razor and her handy Axe.