Yun Manxia lived a tragic life as the fourth wife of Bai Hedu, the powerful and reclusive Ninth Master of the Bai family. After being betrayed by her stepsister Yun Yiyi and her lover Bai Chengxuan, who conspired to steal her late husband's fortune, Yun Manxia was left to die in an alley. In her final moments, she learned that Bai Hedu, the man she had once feared and avoided, had sacrificed his life to save her. Reborn back to the day she was supposed to marry him, Yun Manxia resolves to change her fate. She abandons her plan to elope with Bai Chengxuan and instead proceeds to Yujing Garden to marry Bai Hedu, determined to protect him and make amends for her past neglect.
Upon arriving at Yujing Garden, Yun Manxia encounters a hostile environment. The household staff, led by the stern Aunt Wu and her ambitious daughter Wu Xiaoya, despise her and attempt to undermine her authority from the start. They deny her hot water, misdirect her to the wrong room, and eventually seize her designated bedroom for Wu Xiaoya. Despite these provocations, Yun Manxia remains calm and strategic. She confronts Wu Xiaoya publicly, asserting her status as the rightful mistress of the house. When Bai Hedu returns, Yun Manxia appeals to him directly, calling him "husband" and reminding him of his promise to reward Wu Xiaoya. Bai Hedu, intrigued by her boldness and genuine affection, sides with Yun Manxia, ordering the servants to restore her room and reprimanding Aunt Wu for her negligence.
The couple's relationship begins to develop as Yun Manxia uses her medical knowledge to care for Bai Hedu's chronic leg injury, a task previously monopolized by Wu Xiaoya. She treats his wounds with compassion, moving him with a tenderness he has never experienced from previous wives. Meanwhile, Yun Manxia discovers that her mother's valuable medical notebook, containing ancient prescriptions, has been stolen by Yun Yiyi. She retrieves it by exposing Yiyi's theft at the Yun family home, securing her inheritance and cutting ties with her manipulative father and stepmother.
Bai Hedu, noticing Yun Manxia's lingering sadness, attempts to cheer her up by sending her a rare bouquet of roses from her university, University A. However, Wu Xiaoya intercepts the gift, claiming it was intended for her. Yun Manxia publicly challenges this claim, forcing Bai Hedu to clarify that the flowers were indeed for her. He dismisses Wu Xiaoya's request for an identical bouquet, further solidifying his support for Yun Manxia. The incident deepens Yun Manxia's affection for Bai Hedu, who begins to reciprocate her feelings, though he remains guarded due to his illness and past traumas. Yun Manxia continues to navigate the complex dynamics of the Bai household, balancing her love for Bai Hedu with the ongoing schemes of her enemies, while secretly working to cure his illness using her mother's medical legacy.
