The drama tells the love story of a man and a woman in the process of shuttle, which is divided into two phases: 1998 and 20 19. Huang Yuxuan, 27, has been looking for her boyfriend Wang Quansheng who has been missing for two years. Later, she accidentally crossed 1998 and became a senior three student, Chen Yunru, so at that time, Huang Yuxuan's soul was hidden in Chen Yunru's body.
Huang Yuxuan fell in love with Li Ziwei. After Chen Yunru was killed, Huang Yuxuan crossed back. Huang Yuxuan just went to college. Strangely, the Wang Quansheng Huang Yuxuan met seems to have known her for a long time. In fact, Wang Quansheng at this time is a soul-penetrating Li Ziwei. Until two years ago, there was an air crash in Wang Quansheng, and there was no news.