A book called The Yuefang Manual reveals a forbidden art that trades one life for another, and uncovers a little-known tribe and a mystery hidden for thousands of years. When a little girl who doesn't know how long she has to live and a young man with a prosthetic hand and jumbled memories appear, a conspiracy quietly takes shape. An abandoned tomb tower, a sinister village of dolls, an ancient site in a bewildering mountain: they think they know everything, but they have no idea this is only the beginning.