Nora and Hae-sung had been best friends as children, but the little girl's move separated them. Twenty years later they find each other again online, but as adults they are at a very different place in their lives. She's a successful writer in New York, in a serious relationship, while he's adrift in Seoul. They begin to reconnect through the internet, and a true and deep adult friendship develops between the childhood comrades. However, Hae-sung's visit to New York triggers an unexpected emotional avalanche in both of them, forcing them to finally face their true feelings.