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.

Jin (Kang Ha-Neul) is Kim Min-Jae’s son and the King’s son-in-law. Due to his position as the King's son-in-law, he is unable to take part in politics and only seeks out pleasure.

Kim Min-jae is a brilliant general who's distinguished himself by protecting the borders of the recently established Joseon dynasty. He keeps a close eye on Yi Bang-won, the fifth son of King Taejo, whom he believes has ambitions of seizing the throne. Yi Bang-won was instrumental in helping his father overthrow the Goryeo dynasty and founding Joseon, but was passed over when Taejo chose his successor. Meanwhile, Kim Min-jae falls in love for the first time with a gisaeng named Ka-hee, whom he takes as his concubine, not realizing that she aims to carry out a vendetta against him.