In view of the increasingly chaotic social security in Qingshui City, Lin Yin was appointed as the new public security chief of Qingshui City. On the way to his post, he personally captured three strong men who committed the crime, but one of them asked the police station chief Zhao Tiejun to let him go. Coupled with the lukewarm attitude of deputy director Niu Ming, Lin Yin felt very uncomfortable. One night, the office of Secretary Wan of the Municipal Party Committee was stolen, and Lin Yin issued a military order to solve the case within a time limit. From then on, Lin Yin relied on upright police officers such as Qin Zhijian and Gao Xiang, and with the support of Deputy Secretary Chen of the Municipal Party Committee and Mayor Hong, he launched a desperate struggle against Zheng Guangjun and the corrupt forces within the public security.
