In Tianjin in 1941, neon lights and gunpowder smoke floated on both sides of the Haihe River. The Puppet North China Political Affairs Commission, the Japanese Military Special Higher Education Course, the Military Command Tianjin Station, and the Soviet Sorge Group were all intertwined here, forming an airtight spy network. Lu Zhiheng, codenamed "Jingzhe", appears to be a biochemical scientist immigrated from Manchukuo. He was employed by the Japanese Army's North China Epidemic Prevention and Water Supply Department, but in fact he is an agent of ours who is buried deep in the enemy camp. He has no aerobics and doesn't know how to shoot or fight. His only weapons are his photographic memory and his top attainments in biochemistry.
The Japanese army's top-secret "Plan Ziwu" is advancing in Jinmen - using biological and chemical weapons to carry out devastating attacks on the anti-Japanese base areas in North China. Lu Zhiheng's mission is to steal the core data of the plan and uncover the traitor codenamed "Hanchan" lurking in our side. He deals with the bloodthirsty Japanese army major, the ambitious high-ranking officials of the pseudo-regime, and the treacherous military agents. Every reagent deployment and every experimental report may contain fatal murderous intent.
The former mentor has become the leader of the "Ziwu Project", the childhood sweetheart has become the technical translator of the extra-high school course, and even the street vendor selling sugar-fried chestnuts may be the spy of many forces. When the experimental samples were accidentally stolen, when the traitor's minions reached out to the children in the base, and when his identity was almost exposed, Lu Zhiheng realized that in this silent war, the sharpest knife has never been guns, but the betrayal and perseverance of the human heart. He used the tip of his pen as a blade and a test tube as a shield.
