After his grandmother’s death, Billy Summer, a young American trying to find himself, is abruptly confronted by his family’s secrets.  He decides to try to learn more about his grandfather, a brave soldier who died in the Korean War. Joining a trip organized by war veterans, Billy learns, little by little, about modern South Korea.  There, he will discover the truth about the grandfather he so admired: the “war hero” is in fact a deserter who is still alive in North Korea, the tool of an absurd dictatorship…