An anonymous report on a rainy night led detective Lin Ye to the strange Wayao Village. Empty villages, strange customs, mysteriously missing old people, and hidden caves leading underground have revealed the dust-laden secrets of the village - the archaeological team that disappeared ten years ago, the "taboos" enshrined, the thick fog that cannot be left... Every step of the investigation is getting closer to the truth, and it is also dragging them into the abyss. How many bones are hidden here, and how many souls will be trapped?