17-Year-old Mu Jinse meets 19-year-old Xu Liangcheng, and she has a crush on him. He happened to meet her at the wrong time, and it was a secret love with no ending. Mu Jinse lasted like this for ten years. Ten years may be everything to Mu Jinse, but it is not everything to Xu Liangcheng. Those who missed it will hide in the clouds and come to see you when the rain falls.