Takashi Shinohara, a skilled exorcist known as the "Devourer of Evil Spirits", and his associates rescue a young boy from possession, but their intervention unleashes a complex web of intrigue. As Takashi's troubled past begins to surface, a mysterious organization of fellow exorcists emerges, driven by a hidden agenda. With the aid of an enigmatic incubus, a seemingly innocuous teahouse owner, and a man shrouded in mystery, Takashi must confront his adversaries and his own demons to uncover the truth and reclaim control over his life.