Using "paper kites" as the fateful image, it tells the story of Lin Xia, an ancient book restorer who lacks love, and Su Yuan, an oncologist who has suffered childhood trauma and is in a desperate situation. Starting from the first encounter on a broken kite, they have two-way redemption and ultimate love. They write a tender agreement in a limited time; after Su Yuan's death, Lin Xia uses his love and kindness to complete her self-growth and make the tenderness everlasting.
