29 years after Tokyo was established as the capital of Japan, a series of bizarre and mysterious crimes happening in the city of Kawara. Mysterious flame demon, dark red princess, fireflies seller, puppeteers also appearing near the place of accident. The perpetrator might be spirits or human's dark side.

Hirakawa Shintaro, a journalist, is investigating those mysterious cases with Manzo's help. Their investigation to find the perpetrator brings them to an intrigue inside Takatsukasa family.