Class clown Seungwan and Student Council President Joohyun were best friends in middle school, unfortunately drifting apart as they grew older. What happens when they have to work together to plan for the upcoming rally?

Seungwan is an up and coming indie musician, but her life is in disarray. In the midst of this frenzy, she tries to gain some semblance of order by redecorating. Though originally seeking to find more typical decor in a regular furniture store, she sees signs pointing to a garage sale. There, she finds an ornate vase, one that definitely wouldn't fit in with her current interior design scheme. But she feels a strange pull towards it...

Joohyun likes routine. She doesn't like change. She comes to this street corner every day at exactly five in the morning. But here is this random jogger suddenly stumbling into her life, breaking her routine. And she can't stop seeing her.

Seungwan is curious about the rumors of the ghost on the school rooftop. She goes up to get away from the crowd in the cafeteria and... Are ghosts supposed to be this pretty?

Seungwan and Joohyun have been best friends since childhood. Their senior year, Seungwan moves to Canada for college... and only tells Joohyun the week before she leaves. Hurt, Joohyun doesn't see Seungwan off, doesn't answer her texts, and doesn’t open any of her letters. Years later, Seungwan starts getting strange dreams of a world where she reunites with Joohyun, where she is forgiven. She gets strange notes too... “You have seven days with her...” What does it all mean?