Zaji finds himself in a Japan that has been ravaged by war and lost to the United States. He roams the remnants of what was once a bustling city, plagued by amnesia and haunted by the feeling that he must remember something of great importance. Despite his memory loss, Zaji discovers that he possesses impressive martial arts skills that seem to be deeply ingrained within him after years of training. Gin, the owner of a bar frequented by occupying US soldiers, takes him under his wing. As he struggles to navigate a society in ruins, Zaji's true strength is revealed as he fights to defend the vulnerable.
