公孙丽自小与两位师兄跟随爷爷习武,偶遇少年嬴政遭人欺负将其救下,嬴政对这位妙龄少女念念不忘。战国纷乱,公孙丽与二师兄相恋,二人因战争离开家乡,相依为命。二师兄因保护公孙丽中毒受伤。为换解药,公孙丽进宫嫁给嬴政,成为丽姬,却发现已怀有身孕,嬴政替丽姬瞒下此事,谎称孩子是自己的,天明出生后,嬴政对他视如己出,丽姬深受感动。大师兄韩申进宫营救,得知真相后为保护丽姬及孩子,潜伏宫中做侍卫。丽姬在与嬴政相处中发现这个冷血男人细腻柔软不为人知的一面,不知不觉爱上了他……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 ...