Lanhe, a quiet northeastern town, caused a stir due to a bizarre murder case. A murder occurred at Hongqiao Group, a well-known local company. Three people were killed overnight. The criminal suspect Yang Si (played by Hu Jun) was arrested and brought to justice while on the run. However, the criminal police captain Guan Yu (played by Chen Jianbin) discovered many doubts during the interrogation. Yan Hongqiao's original wife Wang Ping (played by Deng Jiajia) seems to be inextricably linked to the case. As Guan Yu's investigation deepens, a past event in Northeast China from 1990 to 2005 comes to light.