The two girls who were born at the same time during the Xuanyuan period have known each other since childhood due to family reasons and have cherished each other. But the country was unstable and the current situation was turbulent. As a princess, Xiao Nianwei had no choice. Because the emperor suffered a defeat and had to agree to the enemy's plan to make a truce, she had to make the marriage. Chu Huaijin vowed to wear armor and go into battle to personally take back the princess, but when the city was breached, she single-handedly entered the imperial city, only to bring out an infant girl, and she hid in the mountains and forests ever since.