To honor his younger sister, Chen Wanhai set up a small coal stove beside a hospital, offering patients' families an affordable way to cook their own meals. From facing suspicion to remaining true to his original purpose, and from a shabby little shop to four branches, he kept the stove burning for twenty years, bringing warmth to countless families in difficult circumstances. His wife, Zhou Xiulan, his daughter, Chen Jiajia, his son-in-law, Zhou Ming, and his grandson, Niannian, carry on the mission across three generations. Recovered patients such as Song Chunying and Li Boyong return the kindness they received and pass it on to others. Through the warmth of everyday life, this story celebrates genuine human compassion and proves that the faint light of ordinary people can gather into a blazing torch, allowing kindness to cross even the coldest winters and warm people's hearts.