Bok Su, growing up in an impoverished and violent family, becomes a pickpocket at a young age. After doing time in prison, he is released and lives with his father. Bok Su, who returns to pickpocketing, is caught stealing Gyeong’s wallet. He falls for her, but she lives in a different world from his. Gyeong, who comes to know Bok Su’s genuine heart, loves him, but Bok Su learns he has a disease and tells her goodbye. Bok Su, not knowing he has a reason for living and previously unaware of how precious life is, with Gyeong’s help, begins to find the will to live.