Chaeyoung is the black sheep of their family. Their maids are all terrified of her because she doesn't smile, she doesn't talk politely, and she screamed most of the time. Chaeyoung is always involved in a riot that their family lawyer had already picked her at jail for several times now and have a numerous fight at the Son's Mansion with her parents for bawling her out on being a disgrace to the family. 

She doesn't listen to her parents but one thing is an exception...

It's about spending christmas on her grandparents' resthouse which is already a tradition for the Son Family. They always go there every christmas and it's the only thing Chaeyoung is looking forward to in this whole ing year, not because she love to celebrate christmas with her family...

But because she'll get to see her Sana unnie again, the sweet daughter of their resthouse caretaker.

But what if things aren't going as what they are planned? Can Chaeyoung still make it in christmas eve if they got into car accident with her two bestfriends Dahyun and Tzuyu?