After their son is born, Qin Shuning suggests that the child take her surname, sparking a disagreement between the couple. Soon, issues involving the birth certificate, the full-month celebration, and household expenses begin to arise. Lu Tingchuan discovers that some of the family's money has been used to help his wife's younger brother. Faced with these conflicts, the two begin reviewing their accounts, dealings with relatives, and childcare responsibilities. Qin Shuning gradually realizes that marriage requires mutual discussion and cooperation. In the end, the couple establishes clear boundaries with their families and works to rebuild their trust.