An accidental exchange of room cards caused Chu Ruo Yun to accidentally fall into a contractual marriage with her best friend and boyfriend Long Hao Tian. Although it was a commercial marriage forced by the interests of the group, Long Hao Tian was dissatisfied with the Chu family's bullying of Chu Ruo Yun, and still domineeringly proposed to protect his fiancée. The two fell in love unknowingly, secretly promised their hearts, and decided to get married sweetly. But the appearance of the ex-boyfriend and the sudden return of his best friend broke everything that seemed peaceful...
The story takes place during the chaotic times of Western Wei, where innocent citizens are often kidnapped and turned into slaves. Slave girl, Chu Qiao was thrown into a forest along with other slaves and becomes the next hunting target for the rich lords. She is saved by the Prince of Northern Wei, Yan Xun. Afterward, she is brought into a powerful family of Yu Wen and witnesses their bloody power struggle. Seeing this, she swears to take her younger sister and flee from the situation. However, she catches the attention of Yu Wen Yue and undergoes strict training while building a sense of companionship with Yan Xun. Unfortunately, Western Wei goes into battle and Yan Xun’s family is slaughtered. After that incident, Yan Xun grows ambitious and cruel to avenge for the things and the people he lost. He doubts Chu Qiao and takes advantages of her loyalty and love many times, disregarding their relationship as well as the sacrifices he will have to make for power. Disappointed with the man she once loved, Chu Qiao eventually breaks off her relationship with Yan Xun and chooses to fight with Yu Wen Yue, destroying Yan Xun’s plans of vengeance. She eventually convinces Yuwen to free the country from slavery, becoming a successful military strategist/female general in the people’s hearts.