In the seventh year of her marriage to Shen Yue, Jiang Wan introduces her adoptive mother, Zhou Xiulan, who has been divorced for many years, to her widowed father-in-law. Six months later, the two elderly people register their marriage. At the first family dinner after the wedding, Shen Yue produces a power of attorney to sell the house, demanding that Zhou Xiulan sell her old 63-square-meter apartment to cover the 350,000-yuan shortfall in his younger brother Shen Feng's wedding home purchase. Jiang Wan discovers that the Shen brothers had chosen Zhou Xiulan as their target seven months earlier and were merely waiting for her to make the introduction. Her husband had also concealed his severe oligoasthenospermia, making her take medicine and undergo examinations while allowing her to bear the blame of being unable to conceive for seven years. Three months earlier, Zhou Xiulan had already transferred ownership of the property to Jiang Wan and registered a lifelong right of residence, rendering the power of attorney invalid. Mother and daughter each divorce their husbands and successfully protect their home.