Hae-won, a former cello teacher, decides to stay with her aunt for a while back in her home town. She hears that an old house has been changed to a small bookstore. Soon she finds out that the owner of the bookstore is Eun-seop, her old friend.

Hae-won decides to work part-time for the 'Goodnight' bookstore. Meanwhile, she talks about an old high school friend who betrayed her.

The story between Boyeong and Hae-won is revealed and how they became distant. Meanwhile, due to the freezing weather, the water pipe line in Hae-won's house is frozen. As a result Eun-seop and Hae-won begins to live together at the bookstore.

Hae-won meets Boyeong and they have a conversation in 10 years, but their relationship does not get better. Meanwhile, Eun-seop saves his employee from the mountains at night. Next morning, Hae-won encounters her mother at the local market.

Myeong-ju, Hae-won's mother, was sentenced 7 years after killing her husband. Hae-won thinks she is irresponsible for leaving her alone. Meanwhile, Eun-seop cheers up Hae-won by watching a movie together.

Haewon's house is fixed, and she goes back home, leaving Eunseop behind. Meanwhile, Yeongu expresses his affection towards Haewon, but Haewon refuses and confesses her love to Eunseop instead.