After being widowed, Zhao Chunmei loses her son and daughter-in-law in her later years, leaving her to raise her six-year-old grandson, Xiaoman, alone while drowning in debt. Her own daughter pressures her to remarry in exchange for a 100,000-yuan bride price. One day, Zhao rescues Huahua, a little girl with an intellectual disability, at her butcher shop. Huahua's grandfather, Zhou Guoliang, unexpectedly proposes to her. To secure school enrollment for her grandson, Zhao agrees to be Zhou's wife for one hundred days. After the wedding, she faces suspicion and disdain from her stepson, Zhou Jiancheng, as well as schemes from the malicious housekeeper, Liu Guifen. Relying on her own hard work and warmth, Zhao protects her family, helps Huahua recover, and exposes the housekeeper's true nature. In the end, her stepson accepts her as his mother, and the whole family finds happiness together, protecting and supporting one another.