The story of Zuo Yan, a private detective with a master's degree in psychology, and Xie Cong, a third-rate magazine editor, live together.
Xie Cong recruited Zuo Yan as his roommate through the introduction of an acquaintance because his bride ran away early in the wedding and he was unable to afford the mortgage alone.
Zuo Yan used Xie Cong's house as an office, which made Xie Cong very angry, so Xie Cong became a shareholder of the detective agency after bargaining.
The cases unfolded one by one, and each one provided interesting material for Xie Cong's column. Zuo Yan threatened him that sooner or later, such exposure to people's privacy would lead to corpses on the streets.
Xie Cong refused to listen, and Zuo Yan rescued Xie Cong again and again, and their relationship became better and better.
Until Xie Cong discovered Zuo Yan's psychological consultation notes, the person numbered 000 was actually himself...