It tells the psychological course of Ye, a post-90s college student, who helped Song Jia, a female college student, find her relatives. When Yang Jiajia and Ye were playing at the top of the mountain when they were young, Yang Jiajia accidentally fell off a cliff and disappeared from there. When she grew up, Ye Zhaonan met a beautiful college student, Song Jia, who slowly opened the nightmare that troubled Song Jia's mind and untied Song Jia's heart. Ye not only knew that Yang Jiajia was Song Jia, but they also got pure love.