Western gunfighter Billy Kid decides to embark upon a new life and, accompanied by his sister, sets off on the long journey to his ranch. The journey is fraught with danger as Billy is attacked by both gunmen and lawmen.

A busty Batwoman enlists her beauteous bevy of Batgirls to help her regain a mad scientist's invention–an atom bomb made from a hearing aid–before costumed ne'er-do-well Rat Fink can glom onto it for his own purposes.