After a long period of peace, the Western Xia dynasty invades the Song dynasty, leading to the deaths of Yang Liu Lang and Yang Zong Bao at the hands of Pang Tai Shi. Mu Guiying attempts to lead the female warriors of the Yang family into battle, but is falsely accused and faces many obstacles, including being separated from Yang Pai Feng, who later encounters an amnesiac Yelü Haonan and develops feelings for him.

Li Yuanhao, the prince of Western Xia, secretly approaches Guiying and others to deceive them and attempts to use their help to seize the throne. In the end, his scheme is exposed, and he is saved by the Bǎihuā Princess. Guiying is appointed as the commander to fight against Western Xia, but Yuanhao kidnaps Pai Feng and forces Haonan to help him kill his father and seize the throne, as well as to fight against the Song army. Guiying vows to eliminate Yuanhao.