This is a story about leaving and coming back, two cities, two people, several periods of time, search and pursuit. Xia Xiaoai is a typical southern girl who chose to go to the north to study in college and then returned to her hometown to work; Lin Guyu spent his childhood at his grandmother's house in the south, but returned to his hometown in the north when he was a teenager. Later, they returned to the small southern town where their grandmother lived. They had been to the same place, were obsessed with the same taste, and even missed the same person, but they never knew the existence of each other. Going around and around, for Xia Xiaoai and Lin Guyu, does meeting mean leaving, and leaving is also a turning point.