Shen Yanqiu, the archivist of the Lin'an Refugee Resettlement Committee, compiles the list of refugees every day. No one knew that this list contained two-way secret reports between the Yangtze River Group and the military commander. Ichiro Ohara, the director of the Special Higher Education Course of the Bamboo Organization, suddenly entered Lin'an, and Gu Weijun, the head of the Military Command Lin'an Station, ordered a city-wide purge. Before his arrest, Lao Qian, the underground party liaison officer, left his last secret message: "There is something inside the bamboo leaves." Shen Yanqiu was forced to start an emergency deduction: Has Lao Qian rebelled? Does spying mean surveillance or spying? He used an expired household registration record in the archives to forge the escape route of Lao Qian's family members, and simultaneously led the investigation directions of the bamboo agency and military commanders to a fictional "traffic station." But the deductions consumed his short-term memory. He began to forget whom he had sent newspapers to. And Gu Weijun's deputy official, Shi Jie, was holding a signature on the forged route and comparing it with the archivist's handwriting...