In the second part, Zhang Dayong (played by Tao Dayu) and Li Zhongyi, a pair of tacit partners, continue to fight wits and courage with cunning and vicious criminals. In terms of feelings, Dayong and Gao Jie (played by Guo Keying) become a bickering couple, and their feelings are growing steadily. The new female police officer Lan Jiawen (played by Guo Aiming) is simple and kind. She has a crush on Dayong and takes the initiative to express her love. This brings a new crisis to Dayong and Gao Jie's problems. At this time, Gao Jie discovered that Jiawen had set fire and killed people in a foreign country because of a love triangle in the past. Just when she was about to expose this past, Gao Jie's friend was strangely killed. Jiawen's denial of the past does not seem to be fake, and the misunderstanding between Dayong and Gao Jie intensifies, and the truth of the matter is confusing.