After a nuclear attack in Tokyo, the female population is attacked by infected males who have become sex-crazed zombies, hungry for human flesh. Officeworker Momoko and nurse Nozomi seek shelter in a Shinto Shrine, where they meet housewife Kanae and school girl Tamae. With no choices left to them, the group of girls decides to take a stand and arm themselves with assault rifles and explosives to fight off hordes of horny zombies. What is the secret to killing the zombies for good?

After four years overseas, Shozo returns to Japan to avenge his yakuza boss who was assassinated by his own treacherous top man, Kurawaki. The resulting battle leaves both men severely injured, and Shozo awakens in a mysterious medical facility to find his arm replaced with an M61 Vulcan cannon and his leg replaced with a rocket launcher. Meanwhile, Kurawaki has been fitted with mechanical augmentations of his own. Get ready for the second round.