Breakfast shop owners Guo Dacheng and Ma Guizhi stumble upon Zhao Xiaokui and her younger brother, whose parents have passed away and who have been driven out by their aunt and uncle. Starting from taking leftover food secretly, they are silently cared for; Guo Dacheng and his wife provide them with meals, medical care, and take them in. Ma Guizhi is hard-spoken but soft-hearted, wearing herself out with heart disease for the children. When their aunt and uncle take advantage of demolition to fight for the house, she collects evidence despite her illness, guarding the children's inheritance and right to choice. Before Xiaokui's college entrance examination, Ma Guizhi suddenly passes away, and Guo Dacheng follows her last wish to hide the news of the funeral. Xiaokui is admitted to university, and years later returns home to pay respects. Warm buns and the old shop witness a family bond surpassing blood.