Gongsun Li is the grand-daughter 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 Yin 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 Yin 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 came to know a kinder and lesser known side of Ying Zheng and began to fall for him. Facing the harem and the schemes of the concubines, Gongsun Li uses her wits, intelligence and kindness to earn the love and respect of everyone; and finally emerges as the ultimate winner.