Ten years after divorcing, Ma Fengying lives alone, keeping watch over her old family home. When her ex-husband, Gu Changshun, dies in a truck accident, their son, Gu Dalong, dumps his paralyzed stepmother, Jia Caifeng, along with her wheelchair, at Ma Fengying's doorstep. He wants to take the small house registered in Jia Caifeng's name and use it as his marital home. Ma Fengying calls the police, curses them out, and refuses to take her in. But Jia Caifeng suddenly reveals, "I know where your daughter Xing'er, who went missing ten years ago, is." For the sake of this one promise, Ma Fengying swallows her hatred and takes care of her enemy. On her son's wedding day, she wheels her stepmother to the main table and publicly settles three long-overdue accounts: the bride price, the marital home, and filial disobedience. When the bank's safe deposit box is finally opened, there is no money inside, only the train tickets, remittance receipts, and an address from her ex-husband's ten-year search for their daughter.