Both a master of the sword and a slave to it, Aragami Ketsuko cannot resist the tide of violence that would destroy her clan. Taking up her fallen father's 'Red Devil' mask, Ketsuko fights to save her people, no matter the bloody cost. WHAT IS THE SWORD? KETSUKO CARVES HER WAY THROUGH THE WORLD IN SEARCH OF THE ANSWER. 16th century Japan. The fates of warlords ebb and flow like tides of blood, none more than the Aragami Clan...