Xia Yuan (played by Wang Kai), the "genius catcher" of the Beijiang City Criminal Police Team, cooperates well with his teacher and friend Yang Jianqun (played by Hu Jun) in the workplace. In life, he is about to get married to his childhood sweetheart Yu Xiaohui (played by Deng Jiajia), and his career and love are both successful. However, a suicide case caused by the plunge of Crane's stock broke his original life. Crane Group CEO Wang Bolin (played by Liu Yijun) teamed up with stock analyst Hao Xiaoqiang (played by Zhang Tao) to manipulate the stock market. In this conspiracy, his fiancée Yu Xiaohui gradually lost herself, and his master's sister Yang Jianqiu (played by Fu Jing) was also involved in the chaos. The culprit Wang Bolin fled abroad and tried to completely clear himself. Xia Yuan, who had experienced the loss of his beloved and the involvement of his friends in the case, was in great pain. At this time, his colleague Wu Jiaqi (played by Wang Ou) accompanied him out of the trough, and Xia Yuan was able to quickly grow into an excellent economic investigation police officer. After unremitting efforts, Xia Yuan led his teammates to capture the fugitive members of Wang Berlin's criminal group one by one. In the end, they successfully repatriated Wang Berlin and completed this arduous battle that lasted for many years.