The story tells the story of the ninja Kamui, who breaks away from the ninja organization and lives in anonymity in order to escape his bloody past.However, because he betrayed the ancient ninja creed, one night his family was brutally murdered by assassins from the former organization.In order to avenge her loved ones, Kamui reincarnated into her former self.However, the ninjas of the twenty-first century are an anachronism, as they pit their brutal and ancient skills against high-tech weaponry.Kamui must face highly trained assassins, battle droids, and other powerful ninjas to overthrow his former organization.