Lin Sen is a salesman at a 4S store. He has a mild personality, so his performance is mediocre and he has no sense of existence. His father died early, and he depends on his mother for life. He was brought up with strict family education. He lives a mechanical and boring life day after day. Until one day, Lin Sen, instigated by his bad friend Shaozi, accidentally "stole" the bag of his favorite girl Xiaoyin in a restaurant, which started a bizarre experience...