Mok Hye Won (Park Min-Young) smiles a lot more than she used to be, and looks forward to each day with Im Eun-Seob (Seo Kang-Joon). They discover new things to make each other laugh. The two characters have been bitten by the love bug in the recent episode of "When The Weather is Fine."
Im Hwi, Eun-Seob's sister, noticed something different between her brother and Hye Won. He told her not to say anything about them, and Hwi only teased them with her innocent joke.
Jong Pil, Eun-Seob's father, went out and met with his friends. One of his mates told him about a man who was looking for him in the store. He looked similar to Eun-Seob's biological father. Jong Pil returned home and shared it with his wife. Yeo Jung felt sad to hear the news. She got worried about what the man wants from Eun-Seob.
Myung Heo, Hye Won's auntie, was talking on the phone with Yoon Taek, the chief editor of a publishing company. He proposed a new contract with Myung Heo to write a new book. He said he is interested in producing the book the soonest.
On a fine day, Eun-Seob prepared to open the bookstore. A familiar man then arrived to meet him. Eun-Seob for a moment was surprised to see him. His uncle invited him to go to a faraway place and live with him. Eun-Seob was hesitant, but his uncle reminded him that they only have each other now.
Eun-Seob fixed a few things and decided to join his uncle on a trip. He told Hye Won about it, while Im Hwi was upset to hear that his brother was going away. She ran home to tell her parents about it.
The special book club organized an event, "Goodnight Bookstore Flea Market," to sell anything that the group has. Jang Woo was excited to organize such an occasion that the mayor will attend. Everyone in the special book club displayed new items for the visitor to shop and buy.
Hye Won took care of the bookstore since Eun-Seob was away with his uncle. Im Hwi felt sad the whole day, worrying if her brother will come back. It was a memorable night for everyone, and it was also the first time in the village to see Hye Won play the cello. They were all happy to hear and witness her play nice music.
Jong Pil and his wife debated how they would keep Eun-Seob with them. Yeo Jung requested her husband to talk with Eun-Seob, but Jong Pil told her that it will be Eun-Seob's decision since the man is his family by blood. Yeo Jung was upset, dreading to lose Eun-Seob forever.
That night, Eun-Seob arrived and saw his sister Im Hwi. She was disappointed to know that he will go away. She cried and told Eun-Seob she cared for and loved him as her real brother since they were young. Eun-Seob bought a new bicycle seat while he was away downtown. Im Hwi stopped crying and saw the new bicycle seat. Eun-Seob told her it was an expensive part. She tried the new bike seat and happily pedaled around the house. Eun-Seob felt relief when his sister liked his present.
Hye Won waited for Eun-Seob late at night. She was about to go home but she saw Eun-Seob approaching the bookstore, riding his bike towards her. Hye Won was delighted to see him and he walked her home.
