In the early years of the Republic of China, strange cases of missing children occurred one after another in mountain villages in western Hunan. During the investigation, Detective Shen Zhu discovered that his twin brother "Yin Tong" who died young had returned to the world in a twisted form. As the veil of the "life-extending magic" from nearly a hundred years ago was lifted layer by layer, the entire western Hunan fell into a horrific catastrophe that spanned the realms of Yin and Yang.
