Satoshi Yoshida

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.

When fish shop owner Shamoto's teenage daughter Mitsuko is caught stealing, a generous middle-aged man named Murata helps resolve the situation. The man and his wife offer to have Mitsuko work at their opposing fish store. Shamoto soon discovers that something far more sinister lives behind Murata's friendly demeanor.