The Qingyu Bookstore in Wutong Lane hides the tranquility of the years. Su Qinghe and Lu Chengyu became connected through old books and turned their lives into poetry. But Lu Chengyu's childhood sweetheart Shen Yaoyao returned to China and suddenly broke in with their dusty past. She used familiar memories and deliberately showed off to create a rift in Su Qinghe's heart. It happened that Lu Chengyu was involved in the restoration project of ancient books. The busy schedule of leaving early and returning late caused misunderstandings to quietly breed. An accidental damage to an original copy of the Republic of China finally ignited the conflict. When preference is questioned and sincerity is misunderstood, can this relationship that began in the bookshop overcome the turmoil of old acquaintances and the estrangement between people's hearts, allowing the evening breeze to warm each other again?