Qing Yue, the legitimate daughter of a general's household, is framed and killed. Given a second chance at fate, she becomes Qin Wan, the illegitimate daughter of the Right Prime Minister, and is forced into a proxy marriage with Prince Yu, Feng Ling. Relying on her superb medical skills and calm strategy, she gains a firm foothold in the Prince's estate. Alongside Feng Ling, moving from mutual testing to fighting shoulder to shoulder, she step by step exposes the conspiracy of the fake legitimate daughter and Prince You, while protecting her family members. After going through life-and-death trials, the two pledge their true hearts to each other, finally welcoming a grand wedding in a prosperous era and reaping a fulfilling love.