In 2004, a mining town in Ningxia was facing relocation. A burned female corpse appeared in front of the police station. The cause of death was very similar to a vicious unsolved case that occurred there 10 years ago. The retiring veteran criminal policeman Chu Zhiqiang and Zhang Tao, who was demoted to the mining criminal investigation team due to negligence at work, became colleagues and worked together to solve the case. While the town was relocating, they also uncovered the tragic truth left over from the past.