Lin Sen is a salesperson in a 4S store. The personality is gentle, so the performance is mediocre, and there is no sense of existence. His father died early, and he and his mother depended on each other for life, and the family was very strict since childhood. In this way, rewinding day after day is like living a mechanical and boring life. Until one day, Lin Sen accidentally "stealed" the bag of the girl he liked, Xiaoyin, in a restaurant because of the instigation of the whistle of his bad friend, thus starting a strange experience...