Gu Yunsu always had a dream of screenwriter. When she was frustrated in love, she simply let herself go, quit her job to realize her ideal, and was preparing to go home to rely on her mother Wu Limei to raise her for a temporary transition. However, she never expected that her mother, who was nearly fifty years old, would quickly get pregnant with her second child after a flash marriage.Gu Yunsu, who was originally determined to do his best, became a personal caretaker for the elderly pregnant woman without any preparation, and lived under the same roof with her mother who was moving forward, her unfamiliar stepfather, and her brother who was not related to her, and staged a laughable and warm and healing family story.

During this process, Gu Yunsu and his mother's attending doctor Xu Wenbin met each other without fighting, and the two went from happy enemies to heartwarming companions.During the 180-day birth, Gu Yunsu gradually realized his deep dependence and cherishment of his mother, and Wu Limei also had a real experience of her daughter like a % small cotton jacket.Gu Yunsu welcomes the joining of new family members in the company of warm family affection and sweet love, and also finds a new direction in career and life.