The day before New Year's Eve, Lin Qingmiao followed the Spring Festival travel rush from the magical city of Shanghai back to the riverside town that is half city and half city to have New Year's Eve dinner, but the "mysterious boyfriend" she had made an appointment with did not attend the family dinner. Lin Qingmiao, who had lost all face in front of her relatives and friends, angrily vented her anger on her boyfriend. The two drank and had sex in the middle of the night and recalled the past. Lin Qingmiao, who suffered school violence when she was a child, has since become weird, fragile and irritable. When she was fifteen years old, she met the young and ignorant "them" and started a bumpy and laughter-filled junior high school life. At the same time, the fact that the class teacher is her aunt and her cousin is a classmate often makes her feel troubled. Those three years that made people cry and laugh at the same time were the utopia in Lin Qingmiao's memory.