Xu Zhiyi, the legitimate daughter of the Xu family, has been schemed against and slandered by her own family since childhood, enduring endless grievances under the infamous label of a calamity star. The sharp-eyed Duchess of Zhenguo insists on proposing marriage, arranging for her to wed Gu Shiyan, the unruly heir. After marriage, the two begin as adversaries, constantly clashing, but gradually test each other and open their hearts. Together, they investigate an old family case from years ago and expose the sinister true faces of the concubine and Xu Zhiyi's cold-hearted father. Xu Zhiyi establishes herself in the Duke's household, takes charge of the family, and turns the tables against all odds, while Gu Shiyan devotes himself to standing by her side. As they grow together and choose each other wholeheartedly, the injustice is finally cleared, and they remain together for the rest of their lives, conveying the positive values of women's independence and self-reliance, the eventual reward of good and evil, and the belief that only sincere love can sustain a lasting bond.