In 1946, to prevent the Chinese civil war, Zhou Enlai who represented the Communists held a talk with the Chinese Nationalist Party, and George C. Marshall, who represented the Americans at Plum Village in Nanjing. A lost notebook stirred the already turbulent peace talk. The ripples alert the three sides and a battle of spy and anti-spy began. Many historical figures like Zhou Enlai, George Marshall, Chiang Kai-shek, Soong May-ling, He Yingqing, Chen Cheng, and Hu Zongnan are depicted in the movie. Other fictional persona such as the ace agent Xiong Huiquan, the female journalist, and a secret spy who belongs to the Confidential Bureau adds tension to the critical moment.

Shanghai, años 30. El partido comunista mantiene su lucha contra los nacionalistas en el poder mediante agentes secretos en la sombra. Una joven adolescente se une a ellos por amor sin saber las consecuencias que atraerán sus actos.

1946年，国内局势变幻动荡，内战一触即发。一拨38 人的顶尖军事精英正启航赴美，然而一本意外遗失的笔记，揭露了这份名单中存在卧底。在特工遍布的南京，美蒋特务暗中勾结，计划除掉名单中的卧底 “一号目标”。两军围绕“谁是卧底”进行着一场惊心动魄的博弈。潜伏暗处的“一号目标”何时现身？能否扭转内战乾坤？生死攸关的暗战较量，令人窒息……

Shanghai, jaren dertig De communistische partij zet haar strijd tegen de nationalisten aan de macht voort via geheime agenten in de schaduw. Een jonge tiener sluit zich uit liefde bij hen aan, zonder te weten welke gevolgen haar daden zullen hebben.