Joon-young is a middle school student from an ordinary middle-class family. He meets Young-ok in the same school following an accident in which he gets his two teeth broken by the baseball bat Young-ok was swinging. The accident reveals that Young-ok is from North Korea. Nevertheless, they are drawn to each other. One day during a basketball game, Joon-young’s classmate find Young-ok and make fun of him for dating a North Korean girl, which Joon-young strongly denies. Out of guilt about being indifferent to Young-ok, he comes to her class to find that she is absent. The film deals with the level of awareness of people from North Korea among South Korean natives, and describes the delicate affection between humans beyond the background.