Concubine Han (the female protagonist) is a freshman. On her way to the cafeteria, she encounters the king Ruoli (the male protagonist) who has traveled from ancient times. When she was trying to help Ruoli find a way to return to ancient times, Xiao Wen (male supporting actor), who grew up with her in an orphanage, told her that in fact they had also traveled through time, and that Ruoli was his father-killing enemy.