Red Balloon

Eun-kang is Ba-da's lifelong friend of 20 years. She helps Ba-da, a jewellery designer, by doing odd jobs for her. When Eun-kang's boyfriend, Tae-ki, whom she had been taking care of for four years, passes the civil servant exam, Ba-da and her husband, Cha-won, take Eun-kang and Tae-ki to a luxury vacation house to celebrate. However, Eun-kang's hidden desires slowly begin to show.

Eun-kang goes swimming in the pool after becoming frustrated from an argument with Tae-ki, and Cha-won watches her from a distance. Meanwhile, Ba-da and Cha-won go through a rough patch due to Cha-won's parents. Later, Eun-kang dresses up to see Cha-won when Tae-ki pushes her away.

Eun-kang and Cha-won ignore Ba-da's calls and spend time together. A falling apart between Cha-won and Ba-da begins due to Cha-won's mother, which Ba-da can't take any longer. Meanwhile, Eun-san and Nam-chul have dinner together after working overtime, and later, Eun-san witnesses Tae-ki cheating on Eun-kang.