When You Ask About Your Return Date, Don't Be Deceived.

Perhaps a person appears for another person, and the encounter he is waiting for is an unpredictable return. Four young and ignorant college graduates have not yet entered the colorful society, but they mistakenly fall into the reincarnation of time and space. Facing a strange dynasty, not knowing the date of return, not knowing the world, whether we can keep our original intention and live our own world!