Teenage Nanoka travels back in time to early 19th-century Japan and meets teenage exorcist Mao. What is the thread of fate that connects them? Together, they seek answers...and kick some demon butt along the way!

The battle rages on as Byoki tries to grasp the once-in-a-millennium opportunity to take over Mao's body. Nanoka witnesses the accident that orphaned her unfold, and suspicion falls on her present-day guardians. Can her beloved grandfather and Uozumi be trusted? What about Mao, who has no memory of his actions when in his hybrid form? Then, young women start disappearing in Taisho era Kyoto. Who is the prime suspect?