Na Young, a Korean girl, and Hae Sung, a Korean boy, were childhood friends who walked home together after school. Na Young later moved to Canada and New York with her parents, while Hae Sung pursued engineering, served in the military, and eventually found a job. Despite the distance, they remained in touch through video chats, reminiscing about their past and discussing everyday life. Na Young, now known as Nora, became a successful playwright and married an American, Arthur. When Hae Sung visits Nora in New York, he spends time with her and her husband, and their reunion sparks questions about their future together.