In 1950s North Korea, during the war with South Korea, Son-a, a stunningly beautiful young girl, saves the life of Il-kyu, a wounded soldier left behind after a brutal battle. Despite being thrown together by tragic circumstances, the innocent young lovers' relationship blossoms, only later to be cruelly severed due to being born into opposing sides of a fight. When Il-kyu leaves to save his mother, he promises to return and Son-a waits for him for a lifetime. Separated by war and countries between them, broken hearted Il-kyu tries everything to return to her in the North. But political realities between the countries make their reunion impossible. As the years go by and their youth slips away, Il-kyu finally gets an unexpected opportunity to fulfill his wish and return to her.