Ouyang Xing Yue, the owner of a dessert shop, and Jiang Hai, a photographer, meet by chance, and love instantly blossoms between them. However, their age gap makes them hesitate about the relationship. Little do they know, they have already become each other's closest pen pals in the world of letters, sharing their deepest secrets and dreams through correspondence, and forging an emotional bond that transcends gender and identity.