Fingerprints of Used Bookstores: Letters from a Decade

Lin Wan is a college student who works in a used bookstore. One day, while sorting out old books, she found a letter from ten years ago. The content of the letter was full of love, but there was no signature or date. Lin Wan became very interested in this and decided to find the owner of the letter. In the process of searching, she met Gu Yan, a boy who was also interested in the letter. The two decided to find the owner of the letter together. As the investigation deepened, they discovered that this letter was inextricably linked to their past...