This book mainly describes the life of contemporary college students. It uses the protagonist Yuan Kai's college experience as a clue to create distinctive characters such as Yuan Kai, Hao Ze, Monkey, Rookie, Jin Dan, and Chen Jing. The main characters in the article all entered college after years of hard study, but they After integrating into college life, many people are no longer the young people who studied hard before. Falling in love, fighting, drinking, smoking, and playing have gradually become the main theme of their lives. Some people sink, some resist, some are indifferent, some enjoy it, some treat it rationally, and some People change as they go. Some people gradually lose their direction, while others are obsessed with their dreams, completely divorced from reality. They are great because of their dreams, but humble because of the reality. They lament that the world is impermanent, the society is muddy, and fortune has played a trick on people. In the end, they realize that it is they who are the cause of the changes in front of them. Suo Jing has lost his direction, even he has no direction in the first place and just drifts with the flow, unable to find his own way back. It's not that he accidentally stepped into the muddy water, but that he has the same smell with it. It's not that the university town has fallen, but that he has never truly soared.