They are twin sisters, but they live in different environments. Their parents divorced when they were 2 years old, and they had to separate. The younger sister Zhong Liyou lives with her mother, while the older sister Zhong Lizuo lives with her father. Zhong Liyou's mother is a workaholic and often leaves Xiaoyou alone at home with a nanny to look after him, so Xiaoyou has been very independent since he was a child. Xiaoyou's biggest wish is to live with her sister one day. On the contrary, Zhong Lizuo's father married a woman after the divorce. The woman treated Xiao Zuo very well, but Xiao Zuo hated that woman. He tried to escape from the house more than once, but he was chased back every time. She also hopes to see her sister one day.
Time passed year by year, and Xiaozuo and Xiaoyou were already 16-year-old girls. They have never seen each other since their separation 14 years ago, and have not even written a letter. However, by chance, the two twin sisters, who had not seen each other for 14 years, met again. And something unexpected happened...