Anastasia Romanov escapes through a portal when her family is threatened by Vladimir Lenin, and she finds herself in the year 1988, befriended by a young American girl.

A high-school teacher in 1983 and a detective in 2015 join forces through their dreams to change the perilous fate of the woman they both love—30 years apart.

Troublemakers Mok-won, Ryu and Hak-moon are far from passing the state examinations. Three female students enter the school during a new spring term and the atmosphere changes. Then one day,…