In 1942, Mu Yuqing, an underground worker of our party, came to the Hangzhou Bandit Suppression Command under Japanese control to work undercover. Not only did she have to complete the undercover mission, she also had to find the Chongqing National Government military reunification agent "Snow Wolf" who cooperated with her actions. The adjutant Liu Xianru who has an emotional connection with him, the astute secretary Huo Xiaoqing, the director of the operations department Su Chenxi... Among these people, who is the "Snow Wolf"? In addition, how should she take revenge against the Japanese military officer Tanaka who caused the death of her family?