Shen Lingyi, the eldest daughter of the Duke of Weiyuan's household, is reborn with regrets from her previous life. Determined to protect her family, she decisively breaks off her engagement and chooses to marry Xiao Ji, the Prince of Jingbei. Her younger sister, Shen Xiaoman, who adores her elder sister and follows her lead in everything, cleverly schemes her way into marrying Xiao Ye, the prince's younger brother. The two sisters thus become sisters-in-law. With her foresight, Shen Lingyi stockpiles grain and invests in property, while Xiaoman follows her example and unexpectedly gains a fortune of her own. To expose the conspiracies of powerful noble families, the sisters join forces and carefully devise a plan. Thanks to her extraordinary sense of taste, Xiaoman manages to avoid danger, while a letter preserved by chance eventually reveals the whole truth. Relying on each other, the sisters overcome one crisis after another, protect their entire family, find their destined loves, and begin a prosperous and happy new life together.