Penerangan：The play takes a vicious case as the entry point, and through the perspective of young criminal policeman Chang Zheng (played by Huang Jingyu), tells the heroic story of two generations of public security officers who are not afraid of hardships and continue to fight to maintain peace and eliminate criminal gangs. In the small city of Changwu (fictional place), on the front line of the crisis-ridden battle, Chang Zheng, deputy captain of the criminal investigation team, was caught in a whirlpool because of his long-term pursuit of the powerful Zhao Xiaosheng family.