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.

Dong Bin has opened a surfing shop by the sea where Xiao Fang started working. The young man, however, seems to be on the run from himself, not being able to move beyond his grief and guilt for an accident that took place when he was still in school. He spends his days doing nothing outside of working, essentially just waiting for time to pass, with no particular purpose. Things change when two individuals his age, Yuan Yong and Yang Fan, appear in the shop, searching for a surfing board not to surf, but to take photographs on. An initially aggravated Xiao Fang eventually becomes friends with them, and the three start hanging out, with their relationship finding its zenith on a night out that ends up in a rather eventful karaoke. It turns out that Yuan Yong is trying to escape his parents' arrangements and Yang Fan is looking for a future in a life that seems as vague as Xiao Fang's.

Jia Baoyu and Lin Daiyu get to know Xue Baochai at the Jia Mansion. The three young people experience all kinds of human affections in the world, and witness a series of open and secret struggles of the rise and fall of a huge family.