Zhang Dayong (played by Tao Dayu) and detective Li Zhongyi (played by Liang Rongzhong) investigate a series of confusing cases. Many of the cases are cases within cases, and mysteries are one after another, but they can still use their intelligence to uncover the truth of the case and strive to bring the criminals to justice. Their emotional line is also tortuous: Rong Jinzhi (played by Su Yuhua), who was a childhood sweetheart of Sha Zhanyong, coveted wealth and left Yong, but had a relationship with Zhongyi. Reporter Gao Jie (played by Guo Keying) sparked love in the process of investigating the case with Ayong, but because Jie already had a boyfriend, the relationship between the two was in a dilemma...