After leaving without saying goodbye three years ago, Su Wan returned to Haicheng with secrets and obsessions, and deliberately appeared in Lu Shiyan's world. He is an elite in the business world and is wary of her "accidental encounters"; she tries to untie the knot of misunderstandings by getting close to him time and time again. From a deliberate reunion in a retro bookstore to a collision in the workplace, when the cold guard is melted by the affection hidden in the closeness, can these missed lovers piece together a happy future again?