Zheng Hao (played by Nie Yuan), director of the Risk Control Bureau of the Lingshui District Taxation Bureau of Xindong City, used big data technology to solve important cases repeatedly, and was transferred to the Inspection Bureau as the chief of the second inspection section; His ex-girlfriend Liang Jinqiu (played by Yang Rong) also returned to China to develop her career at this time after working hard in a foreign country for many years; And with the two of them in college called "high IQ iron three."