Takaya Oogi is a street smart high school student, dedicated to protecting his best friend Yuzuru Narita. The two are wrapped up in an ancient war of darkness and tragedy, begun during Japan's chaotic Warring States Period. The psychic powers of long ago find new life in the hearts of Takaya and Yuzuru. Rival clansmen seek to destroy them, fulfilling the wishes of the long dead warlord, Shingen Takeda. Mizuna Kurabara's acclaimed novels become an animated story of possession, destiny, and the beauty of darkness.