After eight years of the War of Resistance against Japan and the Civil War between the Kuomintang and the Communist Party, the ancient land of China finally ushered in the dawn of the dawn. As the national financial center, Shanghai in 1949 was shrouded in a joyous atmosphere. However, behind the celebration, the Kuomintang, which dared not to lose, sent a large number of spies to sneak into Shanghai, attempting to carry out sabotage activities while the regime was unstable. Among them, Chen Gongpeng (played by Qian Yanqiu), the president of the Guangfu Society, a secret organization of the Secret Service, was the most diligent. He instructed spies, profiteers and the Qing Gang to speculate in silver dollars and print counterfeit banknotes, causing great damage to the financial market in Shanghai and even the whole country. To this end, the Shanghai Military Control Commission embarked on an iron flow operation to rectify the economy, and Yan Shuangying (played by Zhang Zijian), the battalion commander of the special service battalion of the Communist Party of China, was ordered to take the order at this time. Yan disguised himself as a Qing Gang member who sold drugs and mixed into Shanghai. He fought with the cunning Chen Gongpeng. In the process, his life and faith were also subjected to great tests...