Li Zhiwei, the daughter of the wealthiest merchant, was wrongly married in her past life to the heir of the Marquis of Ruan'an, falling victim to a malicious design that plunged her family into distress and ended in deep regret. Reborn in a single moment, she returns to the day of her grand wedding, only to be accidentally taken back to the estate by five-year-old young master Xu Qingshi of the Anwang Mansion, mistakenly becoming the second wife of the cold-faced Prince An, Xu Heming. To protect her family's safety and stability, she uses her entire dowry as a bargaining chip, leveraging the power of the Anwang Mansion to establish herself, stepping carefully to unravel past grievances and safeguard the family foundation. What was meant to be a marriage of weighing pros and cons unexpectedly turns into an arrangement where the outwardly cold yet inwardly warm Prince An has long since given her his heart, while the young master daily clings to her side calling her mother. One wife and one child, cherished for a lifetime.