The pure-blood succubus Vivian Vale enters the Ravencrest Hotel dungeon—known for its zero clear rate—only for the ruby necklace sealing her succubus aura to crack. She can only hide her identity by covering her face. All players mistake her for a mere novice, even the assassin dispatched by the Hunters' Guild lurks among the players, waiting to kill her. Yet after she breaks through the eighth floor, the blood-dress little girl recognizes her as "Mom" through an old code phrase, and Duke Lucien in the mirror identifies her as Vivi—the woman who disappeared five years ago—through the ruby contract brand. It turns out Vivian once signed a family soul contract with four monsters in the Vale House dungeon, and in her search for them, she was hunted down and disfigured by the four great Hunters' Guilds. Floor by floor she descends through the hotel, helping the sacrificed opera bride, the forgotten pumpkin-headed child, the disgraced portrait girl, the apprentice guarding herbal knowledge, the abandoned toy room orphans, the lace girl betrayed by her friends, and the servant spirit hunted by nobles as prey. In the end, she discovers that the true core of the hotel is not slaughter—but the healing of souls forgotten by the world.
