Tengen Uzui's investigation in the Yoshiwara Entertainment District takes a troubling turn when he loses contact with his three wives. A vicious demon has been terrorizing the district's women, and the Sound Hashira fears the worst for his missing spouses.
The Demon Slayer Corps is still grieving the devastation of the Mugen Train incident, but its members have little chance to rest. Tengen recruits Tanjirou Kamado, Zenitsu Agatsuma and Inosuke Hashibira to help with the investigation. Their assignment takes them inside Yoshiwara's most prominent houses, where they must search for the Upper Rank Demon.
