In the old Shanghai Bund in the 1930s, Qiao Shan, an underground intelligence officer with the code name "Lingmao", met Gu Fangren, who were also intelligence agents, With the cooperation of Gu Wenya, he took advantage of the Japanese's mentality towards Longmen's plan, and won Long Pusheng's respect for him, and gained a foothold in Longmen. The conflict between the two was between the Kuomintang, the Longmen Gang, and the Japanese special forces, and successfully rescued our important figures. At the same time, Qiao Shan also fought wits and courage with the traitors, and then severely punished the traitors. In the end, with the secret help of his wife and his comrade Xu Dongcheng who was also an enemy and friend, Qiao Shan also relied on his tenacious will to launch fierce and desperate struggles between the Kuomintang secret agents and the Japanese puppet army. Finally, after going through life and death, he broke through layers of siege, delivered urgently needed arms and medicines to the Soviet area, supported the anti-encirclement and suppression struggle in the Soviet area, safeguarded the party's security, and made great contributions to the liberation of the people of the whole country