Lu Qingyan, the legitimate daughter of a noble marquis's household, is falsely accused by her adopted younger sister and wrongfully imprisoned for three years. Upon her release, she returns home only to find her family fussing over her adopted sister, asking after her every need while no one spares a thought for her. She finally realizes that family ties unworthy of her affection are not worth keeping. Resolutely cutting ties with her family, she returns to her maternal grandparents' home, takes charge of the family business, and rebuilds her life through her own abilities. Meanwhile, Shen Shiru remains faithfully by her side. When her family finally comes chasing after her in regret, she simply replies, 'Too late.' As her adopted sister's true identity gradually comes to light, a shocking truth that could shake the entire imperial court awaits her discovery.