Fushi, after bearing witness to countless disasters and deaths, decides to live a solitary life on an island where he battles ferocious Nokkers. Unexpectedly, the Nokkers start assaulting nearby communities to draw Fushi out of hiding. Hisame, the great warrior Hayase's descendant, leads a group of defenders called the Guardians who are famous for shielding the world from the Nokkers. They ultimately find Fushi, who at first refuses to join them but changes his mind upon learning of the recent Nokker attack. Upon arriving at the village, Fushi reunites with old acquaintances and forges new alliances. Nevertheless, the ongoing war with the Nokkers exacts a heavy toll, and Fushi must summon the strength to confront the agony that lies ahead.