Zhen Zhao, the daughter of a guilty minister, entered Xiao Yeting as a palace maid. She relied on the medical knowledge passed down from her mother to survive in the undercurrent of the palace. She met and fell in love with the forbearing prince Xiao Yi because of the grace of saving his life. However, Xiao Yi was forced to marry an enemy princess as a concubine in order to seize the legitimate heir, and Zhen Zhao died heartbroken after discovering the truth that she was using him to investigate old cases. The two experienced family blood feuds, involvement in border wars, a double conspiracy, and life and death separation. In the end, in the decisive battle between Da Xiao and Beirong, they used the justice of their family and country as their blade to reveal the secrets of the palace for twenty years. However, they also had to face the ultimate choice of "how love must coexist with the world" in the torrent of history.
