Lu Xueni (played by Yu Nan), a senior executive of a Japanese company in Shanghai, was heartbroken by the death of her mother. She was often entangled by various nightmares and past experiences at night. It turned out that she had been living with her mother, an orphan of the Japanese war, and a son who was less than 5 years old. Lonely Xueni dealt with her mother's funeral alone, and had to face the pressure of work and the education of her children. There was no one she could trust except Lawyer Zhou (played by Yu Qian) to discuss with. Just when her uncle who came from afar took away her mother's ashes, an old rural woman who came from the northeast and claimed to be Xueni's biological mother accidentally revealed her life experience that had been concealed until now. The biological mother who fell from the sky broke her original rhythm of life, and Xueni had to accept the fact that she had a biological mother. Her son Bubu also liked this simple and humorous grandma very much. The family gradually accepted each other as they got along day by day, and the new life melted Xueni's lonely and stubborn heart. In order to take care of the feelings of the elderly and children, Lu Xueni decided to quit her job at the Japanese company and prepare to change her lifestyle. However, unexpectedly, a physical examination and the pricking of the old woman's hand turned the story from a simple mother-daughter relationship into a touching and selfless love.