Two girls born in the Xuanyuan era met as children because of their families and grew to cherish one another. But the realm was unstable and the times turbulent. As a princess, Xiao Nianwei had no choice: after the emperor lost a battle, she had to agree to a marriage alliance with an enemy state to secure a truce. Chu Huaijin swore she would don her armor and bring the princess home herself. But on the day the capital fell, when she fought her way into the imperial palace alone, all she managed to bring out was a baby girl still in swaddling clothes. After that, she vanished into the mountains.
