Qin Qinghan, a college student, has been working as a summer job in a bar called "Menghui" every summer since he graduated from high school. Here he has made a group of friends who are on a completely different life path from his own, and they make jokes every day and never feel sad. During the summer vacation after his sophomore year, Zhou Mudong, an officer he met during military training at the university, returned to the city where Qin Qinghan was. Through a friend he met in a bar who also came from a gay family, the two reunited in "Dream Return". But the reunion after a long absence did not take the two back to the past, but turned into a real ending. When the light cold has arrived and late winter is coming, we will face the real farewell to summer.