A college entrance examination eve campus accident, changed the fate of two teenagers.
Chen nian (zhou dongyu is acted the role of) disposition is introverted, it is the excellent student in the school, review hard, take an examination of good university is the only idea of her 3 years. The accident that classmate falls building is involved in a series of story that do not know, Chen nian also is involved in among them a bit... In her most lonely moment, a call small north (Jackson is acted the role of) teenager broke into her world...
Most people are bright and happy at 18, but they got a taste of the adult world's indifference in the summer of 18. A secret "battle" is taking place, they will protect the dignity of youth together.