In the ninth year of Tang Wude, the inner court changed, and the daughter of the former crown prince, Li Changge (played by Dilireba), escaped by chance. On the way to escape, Changge met Ashile Falcon (played by Wu Lei), a special agent of the grassland tribe, who was aliased as Qin Zhun. The two did not know each other after fighting, and gradually developed a feeling of heroism. Changge smashed a conspiracy in Youzhou, and at the same time her identity was exposed, and she went to Ezhou to avoid disaster. She hid beside Gongsun Heng, the governor of Ezhou, to help him fight against the invasion of grassland forces, but she did not expect that the enemy general Falcon was an old acquaintance of Qin Zhun. Changge was shocked and heartbroken. However, the situation in Ezhou was critical. In order to buy time and wait for reinforcements, Li Changge negotiated with Falcon. For the overall situation, she was willing to become a prisoner of war and was taken to the grassland. She accidentally learned that the Great Khan had other ambitions. Changge decided to put aside her personal grudges for the time being and risked her life to break the situation. Falcon was willing to be the enemy of the Great Khan to save Changge, but the two were separated by accident. Changge went into exile and gradually realized the truth that benevolence is invincible after going through so many hardships. She finally let go of her personal grudges. After discovering that the former Sui forces were the masterminds behind the incident, Changge and Falcon joined forces to protect the peace between the Tang Dynasty and the grassland. They finally recognized their feelings for each other and joined hands to face the crisis.