The second-generation rich man Li Wangfeng (played by Zou Wenzheng) was involved in a traffic accident. As the only witness, Meng Ziliang (played by Hu Yaohui) was hesitant and unclear on the matter. Liu Menglong (played by Cheng Zhongji) is the undercover agent responsible for investigating the case, and Meng Ziliang happens to be his childhood playmate...