Era: Autumn of 1948, on the eve of the Liaoshen Campaign, Jinzhou at the decisive moment.
Core: This is a silent war that takes place within the confidential office of the Jinzhou headquarters of the Kuomintang's "Northeast Suppression Headquarters."
Protagonist: Chen Mo, codenamed "Qingshi", the most lurking CCP intelligence agent. There is no smoke in his battlefield, just documents, passwords and ubiquitous scrutiny.
Opponent: Zhao Hanmin, a shrewd and suspicious military inspector, whose mission is to find the "nails" inside.
Story: In the countdown to the decisive battle, top-secret military orders are flowing in secret places like blood. Chen Mo must send information about the fate of Northeast China in the heart of the enemy under the desperate situation of double verification and daily inspection. He takes advantage of the weaknesses of human nature, the gaps in the system, and his extraordinary memory to launch logical life-and-death games with his opponents. This is not only the transmission of information, but also the silent burning of faith in the darkest moments.