The special homicide case that was unsolved in 1997 resurfaced 13 years later. Criminal policeman Wei Zhengrong, who wasn't able to find out the real murderer that year was traumatised and left the front line. The once fledgling new policeman Lu Xingzhi grown from his innocence and has become a meticulous criminal investigation expert. The many coincidences of the case brought the master and apprentice together again to hunt down the real culprit.
At the former Xuri Factory, a dismembered female body is discovered in an abandoned sewage pit. Veteran detective Lian Haiping and rookie officer Shi Qiangfeng, despite their differences, must work together to solve the case. Their investigation reveals unexpected social issues and brings to light an old case that complicates their personal and professional lives.
