Shen Qingtan was once the beloved eldest daughter of the Marquis of Cheng'en's household. In her previous life, on her wedding day, she was schemed against by her fiancé, Zhao Jue, and her younger half-sister. She devoted herself to helping Zhao Jue secure the position of heir to the duke's household, only to discover his illicit relationship with her sister and learn that she was not the Marquis's biological daughter. She died with resentment in her heart. Reborn, she returns to her wedding sedan chair on the day of her marriage and takes hold of the frail Zhao Yan, resolving to marry him instead. After their wedding, she carefully counters the schemes of the marquis's household and the second branch of the family, stirring up internal rivalries. As she pursues revenge, she gradually falls in love with the physically weak Zhao Yan and uncovers her true identity: she is the long-lost legitimate daughter of the Prince of Zhenbei. With powerful support behind her, she settles accounts with her enemies, reunites with her biological family, and finds lasting happiness with Zhao Yan.