Woo Seul Ki grew up in an orphanage out in a province. She moves to Seoul and enrolls in Chaehwa High School, which is a school for the top 1% students in South Korea. Woo Seul Ki doesn't get along with the other students. A student named Yoo Je Yi approaches her and they become friends.

A love story between a couple in their early thirties. They belong to the same era but alternate realities.

A single-log bridge romance that unfolds as Seok Ji Won and Yoon Ji Won, who were born on the same day and with the same name and have been enemies for generations, reunite after 18 years.