Hae Won meets Lee Jang Woo, an old school friend. He invites her to a book club meet that happens at Eun Seob's store. Going around the town, Hae Won thinks of a friend who once betrayed her.
Kim Bo Yeong's past is revealed along with the reason that led her to betray Hae Won. Hae Won is forced to take shelter in Eun Seob's shop when her house freezes.
Back in the city, Hae Won and Bo Yeong run into each other and share a cup of coffee as they talk about the past. On the other hand, Eun Seob goes out to rescue a woman lost in the mountains.
Hae Won's mother's unexpected arrival in town leaves Hae Won and her aunt, Shim Myeong Yeo, confused. Later, Hae Won meets Bo Yeong again for an important conversation.
Hae Won's search for Eun Seob ends in the woods, but Eun Seob continues to act cold and distant towards her. Things get more awkward between the two when Hae Won falls sick.
Eun Seob welcomes a mysterious visitor, who presents Eun Seob with a difficult choice. Later, Hae Won takes up the responsibility of running the bookshop's flea market in Eun Seob's absence.
Eun Seob and Hae Won visit the bookshop's landlord when they receive an eviction notice. On the other hand, Myeong Yeo is forced to confront her past because of a friend's ill health.
The sisters, Shim Myeong Joo and Myeong Yoo's traumatic past, is revealed further. After a while, Bo Yeong visits the bookshop with a confession for Eun Seob.
Hae Won and Bo Yeong confront their past and finally have an honest conversation about their deeds. Meanwhile, Hae Won finds Eun Seob's secret diary and reads it.