The drama takes a major criminal case as its starting point and, through the perspective of young criminal police officer Chang Zheng, tells the heroic story of two generations of public security officers who risk everything and press on one after another to keep their community safe and stamp out criminal gangs. In the small city of Changwu, on the perilous front lines of the fight against crime, Chang Zheng, deputy captain of the criminal investigation squad, is drawn into a series of dangerous entanglements after pursuing the powerful Zhao Xiaosheng family for years.
