After the Mugen Train tragedy, members of the Demon Slayer Corps still carry its heavy burden. Even though they were granted a period to heal, life must press forward, for the malevolent never cease: a cruel demon is harassing the seductive women of Yoshiwara"s Entertainment Quarter. The Sound Hashira, Tengen Uzui, and his three wives take the lead. Yet when he abruptly loses contact with them, Tengen suspects disaster and summons Tanjirou Kamado, Zenitsu Agatsuma, and Inosuke Hashibira to slip into the district"s top residences and find the corrupt Upper‑Rank demon rumors spread that the demon strike.