Sun Xiaolei, a drama school student, is facing the first important competition in his life, but the delay in changing his voice makes him anxious. In the process of preparing for the competition, Xiaolei accidentally became friends with two competitors - Shi Jiahui, a boyish old girl, and Xie Tianci, who was born in a famous Beijing opera family. In the long summer, the three teenagers are about to face a "reversal" of puberty.
Fifteen year-old Xian goes to live with her father while her mother, a doctor, takes a job in Africa. Soon, she becomes fascinated by her father's stepdaughter, a swaggering, liberated and slightly melancholic young woman.
A group of students trained in the special school for the art college entrance examination.