Lin Xiaohe, a sophomore girl, works part-time as a food delivery person and meets the legendary and mysterious Shan Wang Shendu. He was older than her, taught her the way around, took her on the road, and knocked on the door of her heart with a handwritten guide. But she accidentally learned that this man was married. In the summer when she was nineteen years old, she desperately chased the taillights of his car on the streets of Guangzhou, but she didn't know that there was some distance and she couldn't catch up.
