Even if the gas lamps light up and the darkness disappears, the strangeness is right beside you... In the Meiji era, when the light of civilization illuminated the streets and modernization progressed. The story unravels when Takao Ichinomiya, a novice police officer, who is burning with a sense of justice and very little desire to succeed, encounters a strange Westerner, Yakumo Koizumi who sells his ability as a "worshipper" in the red light district by trapping evil spirits in a book.