Fifty-eight-year-old housewife Li Shufen has been trapped in family life for decades, doing housework and caring for children and grandchildren every day. Her preferences and pains go unnoticed by anyone, and her contributions are taken for granted by her family. Her close friend Wang Shan informs her that the lottery ticket she bought won four million after taxes, and urges her to watch out for her children's true intentions. At home, her husband Zheng Jianshe is harsh and short-tempered, her son and daughter-in-law rely on her for everything as a free babysitter, and her eldest daughter Zheng Xiaoyun only treats her as cheap labor when staying temporarily. After a quarrel, Zheng Jianshe physically harms her and even changes the front door locks, prompting a heartbroken Li Shufen to turn to her second daughter, Zheng Xiaohui, who lives alone outside.