Set in 1398. Kim Min-Jae (Shin Ha-Kyun) is the supreme commander of the Joseon Dynasty. He falls in love for the first time and for that woman he takes risks Yi Bang-Won (Jang Hyuk) is the King’s son. He helped his father setup the Joseon Dynasty era, but he was not picked as the Crown Prince. He still holds ambitions of becoming the King one day.