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 proceeded. The story unravels when Takao Ichinomiya,a novice police officer, who is burning with a sense of justice and a little desire to succeed, encounters a strange Westerner, Yakumo Koizumi who sells his ability as a "worshipers" (he traps evil spirits in a book) in the red light distrikt.