Three hundred years ago, the first generation of the Yin Xu Lord sacrificed the blood of his twin sister to the dragon vein, giving birth to the "Yin Xu Inn" made of blood and flesh. From then on, all twins in the world cannot escape their fate - they will receive a wedding invitation when they are born, and they will be attracted by the phantom in the inn when they grow up. This weird inn across time and space has manifested itself in different places: "Tingyu Inn" in the misty rain in the south of the Yangtze River, "Mobei Lonely Smoke" in the wild sands of the North Sea, "Tingchao Inn" in the raging waves of the East China Sea, "Tuoling Inn" in the desert of the Western Regions... ... The semicolon of Yinxu Inn is always reborn in the blood of the twins. Each inn follows the same rule: the twins need to be betrothed with flesh and blood in exchange for half a lifetime of peace, and the "betrothal gift" left behind may be deciduous teeth, fetal hair, or the soul itself. What the Yinxu Inn collects is not stories, but the flesh, blood and souls of twins from generation to generation - when you turn to a certain page of anecdotes, you may find that the birthmark on the back of your neck has long been imprinted on the human bone column of a certain inn.