On her wedding day, Chu Jiuling (daughter of former crown prince) discovers that the person who killed her father is her uncle (the current Emperor). Just as she decides to seek revenge, she was almost killed by her husband, an imperial guard. Fortunately, she was saved by physician Zhang Qingshan. Chu Jiuling returns with a new identity - Jun Zhenzhen and assists the Fang family in unraveling the schemes of the Emperor, saving them from becoming victims of a political scheme. With her outstanding medical skills and wit, she then changed her name to Jun Jiuling, and heads to the capital to become a physician. After managing to integrate with royalty, she sets out to unravel corruptions behind the political court and win the hearts of people. Eventually she discovers the truth behind her father's death and returns justice to him. She developed complicated romantic entanglement with three different men - son of Duke Chen Zhu Zan, nobleman Ning Yunzhao and her ex-husband Lu Yunqi.

Adapted from novel 君九龄 by Xi Xing.