Gongsun Li is the granddaughter and disciple of military commander Gongsun Yu. When she was young, she met and rescued Ying Zheng, who then fell in love with her at first sight. When the Qin troops were attacked, Gongsun Li's childhood lover, Jing Ke was poisoned while protecting her. In order to attain the antidote for Jing Ke, Gongsun Li agreed to marry Ying Zheng. However, she found out that she was already pregnant with Jing Ke's child. Ying Zheng decides to hide the truth for Gongsun Li, treating the child as his own. Gongsun Li was deeply touched by Ying Zheng's actions. At the same time, Han Shen (Sun Li and Jing Ke's senior) entered the palace to save her and stayed on in the palace as an imperial guard. After much time, Gongsun Li comes to know a kinder and lesser known side of Ying Zheng and begins to fall for him. Facing the harem, the schemes of the concubines, and Ying Zheng's mercurial nature, Gongsun Li uses her wits, intelligence and kindness to earn the love and ...