Doil is about to get out of the army. Waiting for him are Soonyoung, a woman he’s promised to marry, and his newborn son. On furlough, Doil finds out that he is not the biological father, and shortly after, Soonyoung disappears. Doil does everything he can to find her, but is unable to discover her whereabouts. Nothing seems to be working out according to his plan of settling down and getting a stable job. And he’s clueless as to what to do with the baby left to him. Perhaps life in the army, where all he has to do is follow orders, would actually suit him better. Can Doil overcome the struggles that lie ahead? Growing up isn’t something that only teenagers must do.