filmed at mbc dramia in gyeonggi province, the series examines how class determines fate during the joseon era through two men who swap lives. switched at birth, chun-doong and gwi-dong grow up living each other's lives. nobleman's son chun-doong endures great hardships in the lowest caste of society, and becomes a vigilante who steals from the rich. beggar's son gwi-dong grows up in a wealthy noble family, and becomes a police chief. living on opposite sides of the law, their paths cross again when they both fall for the same woman; played by chun, lee and han respectively.