Beautiful heiress Nancy Archer discovers that her no-good husband Harry is cheating on her with town floozy, hairdresser 'Honey' Parker. Harry also wants to get his hands on Nancy's fortune, but can't touch it because of a prenuptial agreement. Having discovered Harry misbehaving in a motel, Nancy roars off into the desert where she is zapped by a laser beam from a passing UFO. Harry uses Nancy's unhinged talk of aliens as an excuse to have her declared mentally unstable so hat he can get hold of her money. The alien encounter has, however, given Nancy extraordinary powers, and when enraged she can grow to a height of 50 feet. Endowed with newfound confidence and zeal, giantess Nancy strides off on a mission of vengeance against Harry and all those in town who have 'done her wrong'!