During the Yanyou period of the Yuan Dynasty, the female doctor Bai Zhi accompanied her father to the border military camp. After her father died in battle, she took over her father's duties to treat the soldiers' wounds. Border general Xiao Yan initially despised women practicing medicine, but was later impressed by Bai Zhi's medical skills and courage. Coinciding with the enemy's surprise attack, a wave of injuries and illnesses broke out in the military camp. Bai Zhi innovated healing methods to reduce the casualty rate. She also taught the soldiers to identify herbal medicines to save themselves. In the process of guarding the border, she formed a deep friendship with Xiao Yan and became a heroine in the military camp.
