In Lingnan District, Harbin City, Long Province, the severe cold of minus 30 degrees cannot freeze the undercurrent of power and money transactions. Hidden in the reinforced concrete of old residential areas are nested layers of corruption networks. Miao Yong, the third-generation legitimate son of the Miao family - the heir to the only top family in Long Province, is willing to become a sharp sword of the Investigation Department of the Procuratorate, lose the family halo, and fight against the intricate interest groups as a mortal. Anonymous reports, frame-ups, and pressure from his family, he worked step by step in the ice and snow, not only to break the ice of local protectionism, but also to stick to his original intention of "not relying on power, only following the law." When cracking down on gangs and evil meets family intrigues, when legal justice collides with the fetters of human relationships, Miao Yong will eventually melt the darkness with his blood and let the breeze of Longjiang land blow away the haze of power.