Ex-special agent Cha Tae-shik’s only connection to the world is So-mi, the little girl who lives next door. When her mother steals from a drug trafficking organization, they kidnap her and her daughter. Tae-shik is suddenly drawn back into his old life in a frantic search to save his friend, but now has both the police and underground crime mob on his trail. While she is still nowhere to be found, he continues his search, but his hidden past is slowly revealed.