Moonbyul and Yongsun' were In love but the first one chose her career over personal feelings. Yongsun wanted to have a family. So she moved on from idol business and built her life. Five years later, Yongsun watches the news about the idol Moonbyul being in a plane crash and she gets desperate. Yongsun's husband doesn't like her reaction. And things will become more tense when Moonbyul is found alive and wants to speak with her ex-girlfriendd.