Li Wan, a 13-year-old girl, lives with her grandparents because her parents are divorced. She is in adolescence and longs for understanding, companionship and love. In the Chinese-style education of "being obedient", Li Wan also completed her "coming of age ceremony". In the movie, the father hopes to reconcile and communicate with his daughter through a pet puppy. Li Wan named the dog "Einstein". The surging youth was accidentally lost because of "Einstein", which opened up its turbulent and helpless growth path.