Ahn Hyejin had it all. She has her dream job, lives with her friend, and is about to get married. However, one day, that changes. When Hyejin discovers her fiance cheating on her, she ends up deciding to go home for Christmas to take her mind off of it. The only problem? She has another issue that is unresolved, one regarding her ex best friend Jung Wheein. Hyejin doesn't expect to see her but after a chance encounter, Hyejin realizes that it's not so easy avoiding someone you used to be friends with. What happens when the two begin to talk about the past to resolve what happened? Will it be a happy Christmas or will things be ruined?