The novel is set in Shanghai and tells the story of Lu Zhengyang, who joined the Shanghai Public Security Bureau in the early days of liberation and became a key figure in the anti-espionage front. In the face of the severe anti-espionage struggle, he boldly used the old policeman Lin Shaobai, who was known as the "Shanghai Know-it-all". The two became partners and successively cracked many major cases planned by Zheng Lanting, the head of the Shanghai Special Station of the Bureau of Secrets, completely smashed the conspiracy of the enemy agents, and safeguarded the safety of Shanghai. In this process, Lin Shaobai gradually grew into an excellent communist fighter and established a deep comradeship with Lu Zhengyang. After everything was settled, Lin Shaobai also chose to rush to a new battlefield...
小说以上海为背景，讲述了解放初期，路正阳加入上海公安局成为反特战线上的一名骨干，在严峻的反特斗争形势下，大胆启用了有“上海百事通”之称的旧警察林少白。两人结为搭档，连续破获了潜伏下来的保密局上海特别站站长郑兰亭一手策划的诸多大案，彻底粉碎了敌特分子的阴谋，保卫了上海的安全。在这一过程中，林少白逐渐成长为一名优秀的共产主义战士，也与路正阳建立了深厚的同志情谊。在一切尘埃落定后，林少白也选择奔赴新的战场……
小说以上海为背景，讲述了解放初期，路正阳加入上海公安局成为反特战线上的一名骨干，在严峻的反特斗争形势下，大胆启用了有“上海百事通”之称的旧警察林少白。两人结为搭档，连续破获了潜伏下来的保密局上海特别站站长郑兰亭一手策划的诸多大案，彻底粉碎了敌特分子的阴谋，保卫了上海的安全。在这一过程中，林少白逐渐成长为一名优秀的共产主义战士，也与路正阳建立了深厚的同志情谊。在一切尘埃落定后，林少白也选择奔赴新的战场……
