June, Jiangcheng. When Li Xi was hit by a flying basketball on the side of the playground, a boy named Ji Nanchen caught the ball for her.
She thought it was just an accidental episode in the summer. But then she discovered that he had seen her photo while standing in front of the honor roll six months ago; he would take a long way past her in every physical education class; he signed up for the 800 meters and relay races, and she filled in her name on the volunteer form.
Summer is very long, and the story has just begun. The June wind sticks to the skin and cannot be dispersed, like some unspeakable thoughts, slowly fermenting in the chirping of cicadas and the heat wave of the playground.
After experiencing hardships and setbacks, the two finally came together. However, due to various reasons, the match made in heaven was forced to separate. The two eventually became the white moonlight in each other's hearts and the regrets of each other's college years. When they meet again many years later, are they reunited or are they strangers...