Plot: Song Yi Ju, a senior student at the Traditional Chinese Medicine University, has long relied on the assistance of teaching assistant Xiao Jing to pass her water-related courses. The two, who have known each other for many years, have always maintained a mutually beneficial relationship. However, after a daytime meteor shower, Xiao Jing begins to act strangely, leaving Song Yiju puzzled and raising a small alarm in her mind. Indeed, the current Xiao Jing is a person from a future time and space.