A limousine is parked outside a church in the suburbs. There are seven members of the university music club on the bus. Among them, Zhihong and Yuri will hold their wedding here soon, and these students who have not seen each other for more than ten years will get together again. Friends include Hao Cheng, a lawyer who has a good career and marriage, Xiang Yu, a university professor who is indifferent and obsessed with celibacy, Qinghao, a TV producer, an industrialist who lives with her little boyfriend, and Min, who is happy and stable. They didn't meet each other on the pretext of "being busy", and they passed their thirties in an instant. Of course, some of them are absent. Everyone hasn't heard from her for a long time. Just after Xi's wedding, Zhenxi's daughter unexpectedly appeared and brought more unexpected news. Zhenxi died in a car accident last month. She came to the wedding this time because one of the people present was her biological father. The news came like a bolt from the blue and caused great repercussions among old friends. Which one of them will be the father of Jin Xi's daughter? What happened more than ten years ago?