Ye Lei and Yan Miao are high school classmates. Like most high school students, the two coincided with each other and left a strong mark in each other's youth stories. How vital is this ambiguity in high school? Can they, who have grown from ignorance to maturity, be able to withstand the coldness of reality? As they take on heavier responsibilities and greater pressure in the family, can their polished hearts continue to throb? Walk, walk, even in opposite directions, on the track of time, we will eventually meet together.