Thirty years old is a watershed in life. In ancient times, it has reached its third year. But in contemporary society, what is the life of these 30-year-olds born in the 1980s like? Meng Xiaofan was unwilling to be ordinary. After graduation, he wanted to make a difference but accidentally returned to his hometown. He accomplished nothing in a junior college. When he encountered a turning point and went abroad, he was betrayed by her husband. She didn't know whether to break off or continue the deteriorating marriage. After Xiaona graduated, she went to Shanghai to work alone and encountered a double blow of relationship and family. She didn't believe in love and wandered around singing and dancing in bars all day long. Three young people, three different lives, the same thing is that they are still in this complicated world. Still waiting, choosing, wandering, gaining and losing. . .