Gwang-hae, wang-i doin nam-ja

In 17th century Joseon Dynasty, a lowly acrobat named Ha-sun (Lee Byung-hun) looks remarkably like the king and is secretly chosen to replace the poisoned King Gwang-hae, who is constantly threatened by assassination. As the king, Ha-sun begins to ponder the intricacies of the problems debated in his court and finds his voice, taking control of governing the country with real insight and fair judgments. The queen (Han Hyo-joo) and the Chief Eunuch are moved by Ha-sun's genuine concern for the people, but the Chief Secretary Heo-gyun (Ryu Seung-ryong) asks Ha-sun to leave the country for good.