When a scientist and his daughter are abducted for Admiral Majin's plot to create new kaijin, Hiroshi pursues with the assistance of Shiro Kazami.

Hiroshi and Shiro rush to the rescue of the captured hostages to save them from Admiral Majin and the combined force of Madkong and Takogang.

While at a resort, Hiroshi and Hayato work to save a dancer and a powerful gem used by an oni kaijin to change women into demons like himself.

As girls are transformed into an army of Uni Demon's minions, Hiroshi and Hayato fight to save them and defeat both the oni and Okappa Priest's control.