Fang Banxia, the chieftain of Black Wind Stronghold in the Great Xia dynasty, guards Xilu Mountain and robs the rich to help the poor. With a court-led siege imminent, she discovers that she is the legitimate daughter of the Fang family, who disappeared from the capital sixteen years ago. After returning to the capital, she faces deliberate schemes by the impostor daughter Fang Jingjing and the Fang family's two sons. Fearless and unrestrained by convention, Fang Banxia uses her own abilities to tear apart the household intrigues and humiliate those who oppose her. She meets Lu Chenzhou, heir to the Prince of Zhenbei, who has been patiently concealing his strength, and the two come to admire one another. When the Western Rong invade, they join forces to defend the frontier and repel the enemy. Later, Fang Banxia proves her innocence before the imperial court, punishes the wicked, and is appointed a military captain. She reorganizes her stronghold into a frontier army and joins Lu Chenzhou in defending the northern borders and their homeland.