1948 In the spring, Li Mei, the head of the second investigation and prevention department of Nanjing Station of the Secrecy Bureau, was seriously injured in the brain during an operation, resulting in partial amnesia and forgetting her identity as an insider. Li Mei's memory was revived by the design of Chinese communist intelligence personnel posing as traitors. After Li Mei resumed contact with the Party organization, she cooperated with the organization to complete the task, and at the same time found the right time to absorb the peak of tactical instructors in Central Army University. Hu Yifu, the stationmaster of Nanjing Station of the Secrecy Bureau, has been spying on Li Mei, who has been in danger several times. During this period, she fought with Gao Feng, sparking love and getting married. In the end, Li Mei helped Gao Feng announce the uprising, and the million-dollar division of the People's Liberation Army crossed the river and Nanjing was liberated.