Set during the Tang Dynasty, the story follows Li Changge, a princess whose life is upended after her family is killed in the Xuanwu Gate Incident. Seeking revenge against the new Emperor, she disguises herself as a man and flees to the northern border. Along her journey, she encounters Ashile Sun, a powerful and skilled general of the nomadic Ashile tribe, who initially views her as an enemy but eventually becomes her most trusted ally. As Changge navigates political intrigue, war, and personal loss, she evolves from a vengeful survivor into a leader who prioritizes the peace and prosperity of the people over her own vendettas. The series explores themes of loyalty, duty, and the complex relationship between the Tang Empire and its neighboring tribes, culminating in a grand struggle for power and survival.