The movie follows the story of Choi In-hyuk (played by Kim Soo-hyun), a young North Korean defector who infiltrates South Korea with the help of a fellow defector, Kim Sun-woo (played by Park Yoo-rim). In-hyuk assumes a new identity, "In-hyuk Choi," and attempts to blend in with South Korean society. He becomes infatuated with a local girl, Yoon Ha-rang (played by Park Min-young), who takes an interest in him.