Synopsis: It has been 100 years since the Battle of Sekigahara. The Nagatsuno domain and Koyama domain at the southern edge of Tohoku have been at odds for a long time. Soya Danjo (Hira Takehiro), the Nagatsuno domain’s chief retainer, keeps invading and plundering the Koyama domain. His deeds trouble his sister Akane (Uchida Yuki). One day, a young boy from the Koyama domain is covered with injuries after being attacked by an unknown monster. He escapes to a Nagatsuno village and is brought to Akane by the wandering samurai Sakakida Soei (Hiraoka Yuta). The approaching monster strikes fear. Together with Sakakida and painter Kikuchi Enshu (Yanagisawa Shingo), Akane musters wit and courage to fight against the monster and uncover the mystery of its birth in order to protect her people. Meanwhile, Danjo plots to manipulate the monster for himself. A love-hate drama unfolds behind the fight with the monster. The unexpected truth about the birth of the monster is eventually revealed and what emerges is a sinful human deed.