Hae Won quits her job in Seoul as a cello teacher and returns to her hometown to stay with her aunt who runs an old guesthouse. When she arrives, she finds a small bookstore called “Good Night Bookstore” in an old, traditional house that used to belong to an elderly couple. She wonders about the bookstore which looks a bit out of place in such a rural neighborhood. Meanwhile, watching Hae Won from afar is Eun Seop, her high school classmate. He is surprised to see her. She is the girl who lived nearby and once asked him what the bales of hay that looked like marshmallows on the fields were called. This story is about finally working up the courage and saying all the things that couldn’t be said before.