On the afternoon of the day before her school trip, Se-mi wakes up from her strange dream and heads to her Ha-eun. It was because she felt like she had to convey the feelings she had been holding back for a long time today. However, unlike her overflowing heart, the two keep falling apart.
A terminally ill surgeon travels back in time through the use of unique capsules to reunite with his dead lover. He then meets his juvenile self and they try to prevent her death.
Rebellious Ki-soo from North Korea is mesmerized by tap dance in prison camps. Ki-soo joins as a team member of a dance team named 'Swing Kids'. Yet suddenly, their dreams about dancing in prison camps are put in danger.
In mid '90s, 3 female high school-grad office workers take up English classes together to get promotions and they team up to uncover corruption within their company.