In the 16th century, the savage onin war reduced Japan to a massive feeding ground. Assuming human forms, demons settled in among mortals to prey on the bloodshed.
A fearless samurai named Kiyomasa rose from the heart of evil and became the most revered demon hunter, only to be brutally slain by the oldest, vilest of all demons: Onigen.
Centuries passed. Darkness reigns on. Then a mysterious hunter emerged, joining forces with a shadow society known as The Council, she sets out to face her ultimate foe… Onigen.