During the Dajing Dynasty, the eldest princess Li Yue was forced to marry the Beidi Khan in order to maintain peace on the border. Female general Su Lan took the initiative to request an escort. On the way, the two were attacked by the "Beidi Rebels". Su Lan sacrificed her life to protect Li Yue, while Li Yue used her wits to recruit reinforcements to rescue the siege. After arriving in Beidi, the two found that Khan was an "enlightened man who wanted peace", so they joined forces to persuade Khan to form an alliance with Dajing to fight against the tribes who wanted to provoke war.
