In the 1990s, a murder case occurred in Huaichuan, a small county along the Yangtze River in central China. The portrait artist Zhang Xin was ordered to draw the suspect. However, he accidentally drew a woman who had been dead for more than ten years. She was Yan Hua, a dancer in the county art troupe. When everyone thought that Zhang Xin had drawn it wrong, the case was strangely linked to a serial murder case in the 1980s. In order to prove himself, Zhang Xin walked step by step into this fog...