Shanghai socialite Lv Hanzhi's father was killed by a traitor, and her family fell into poverty. Since then, she has embarked on the road of resistance against Japan. Due to fate, two men closely related to Lv Hanzhi's fate belong to two hostile camps. Gao Chen, who apparently works for a traitor, is actually an intelligence officer of the underground party of the Communist Party of China. Han Shoumin, who ostensibly fights against Japanese traitors, was once an excellent agent of the Kuomintang Military Intelligence Bureau, but was gradually framed by the Wang Puppet spy organization and embarked on the road of betrayal and surrender to the enemy. The emotional relationship between these three people is full of variables under the background of the Anti-Japanese War. Lv Hanzhi wanders between the two major intelligence masters of the Communist Party of China and the Military Intelligence Bureau, and gradually grows from an inexperienced socialite to an outstanding intelligence officer. Lv Hanzhi is in the bloody fight between the Wang Puppet and the anti-Japanese forces. Her confusing identity and life-and-death undercover career have made her gradually mature after twists and turns in the cruel struggle. Finally, with the help of the Communist Party of China, Lv Hanzhi found her own beliefs and became an excellent intelligence officer of the Communist Party of China who is dealing with the upper class of Shanghai.