Set during the Japanese occupation of South Korea in the early 20th century. Duk Soon is a naive girl living in the country. She likes Suk Sam, but it is in vain. Following Suk Sam, Duk Soon travels to Kyungsung. There, she gets involved in the Korean independence movement.

Young Jae is an aspiring webtoon writer. He works part-time at a convenience store during the day. Young Jae has been unable to sleep for 1 year.

Yoo Jung is unemployed. She has been unable to sleep for 2 years. Young Jae and Yoo Jung live in the same neighborhood and they happen to meet. Due to their insomnia, they have similar routines and meet often. They become attracted to each other.