In the Battle of Songhu in 1937, although the heroic and passionate Chinese men built a flesh-and-blood Great Wall of iron, they still could not resist the ruthless and cruel iron hoofs of the Japanese invaders, and Shanghai, Nanjing and other places fell one after another. After that, people like Wang Jingwei and Ding Moqun (played by Wang Zhiwen) shamelessly recognized the thief as their father and helped the tyrant to commit atrocities. Patriotic sons and daughters such as Guan Pinglu (played by Ma Su) and Zhao Shijie (played by Zu Feng) formed a youth anti-traitor group and vowed to eliminate all traitors and enemy invaders. Because of a precious cheongsam passed down from their families, Guan Pinglu and Ding Moqun, two people who were in completely different worlds, met. From then on, Guan had multiple identities. She was a radical columnist for the newspaper, the mistress of the traitor Ding Moqun, and a member of the anti-traitor team who was always planning to execute Ding on the spot. In the troubled times, a series of epic legends were staged... This film is adapted from the real deeds of Zheng Pingru, the prototype of Wang Jiazhi in "Lust, Caution", and Guan Lu, a famous female writer and underground member of the Communist Party of China.