In the first episode of Doctor Stranger, Park Hoon(played by Lee Jong Suk) and Song Jae Hee(played by Jin Se Yeon) shared a passionate kiss in the rain. Hoon followed his father to North Korea when he was young. He met his first love, Jae Hee, and spent happy days with her, but the days did not last long. Jae Hee was on the purge list and was arrested by North Korean soldiers. Before she left, she kissed Hoon passionately in the rain and was taken away.