The royal guard Zhan Xiongfei was demoted to the remote Qionglu County as a constable, but shortly after he arrived, a homicide occurred in the county. The son of the county magistrate, Bao Xiaobao, and Zhan Xiongfei immediately formed a special task force to conduct an investigation in the imperial cityBefore the team arrives, the deadline for solving the case is set. Unfortunately, things are getting more and more out of control, and death cases are happening one after another. The two of them have also fallen into the huge conspiracy network woven by the killer. With the increase of clues, if this mysterious county town crossesThe more than ten year long serial homicide case is an iceberg, and the two have gradually approached the behemoth beneath the water surface.