Four balloonists and their dog are stranded on a remote island with a woman believed to be a descendant of Frankenstein, who is conducting experiments on lost sailors.

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.