Sister-in-law's identity in Zhuifeng is a villain, which is not good. Her real identity is that Mace is Li Zihang's spy to monitor Li Zihang and his family. Unexpectedly, she has feelings for Li Zihang. So she began to disobey the orders of her superiors, and when her affairs were noticed by her superiors, she became an abandoned child.

The background of Chasing the Wind is during the second cooperation between the Kuomintang and the Communist Party. When Li Zimu met Shuang Ling, because the country was in a critical period and the two sides were in different camps, Shuang Ling once had doubts about this dual-identity playboy. Later, when she learned Li Zimu's identity, Shuang Ling was very angry, but Shuang Ling understood Li Zimu's behavior, so she was relieved. Later, due to the command error of the Kuomintang, Shuang Ling's action failed, and at the same time, Li Zimu's action was hindered by the insufficient strength of the Eighth Route Army. In the action of destroying the "wind shadow", after deliberation, although they have different political positions, they stand together, fight for the national interests together, and fight to the death with foreign invaders. With the support and help of the Eighth Route Army and Party-loving people, they finally won.