Nan-Hee finds herself accepting a prize for winning the Spring Literary Contest but it turns out to be a dream as she wakes up from her sleep. In her real life, her mother constantly nags her to quit her job at a publishing company, which doesn't pay her on time, and urges her to get married. Meanwhile, Nan-Hee and Hyung-Tae receive an identical text message simultaneously. Nan-Hee calls up Hyung-Tae after receiving the text message and realizes in mid-conversation that she and Hyung-Tae had promised to spend the last day of their twenties together at Mt. Nam, and…(Source: IMDb)