The King of Goryeo is married to a Yuan Dynasty princess, but they do not have any children. There is constant pressure on the King both from the Yuan emperor and his own counselors to produce a crown prince and ensure the continuity of the royal dynasty. The King's palace guard is composed of thirty six young soldiers, led by military commander Hong-rim, who is also the King's lover. The King finally decides to charge Hong-rim with a strange commission: Sexual intercourse the Queen to impregnate her. Hong-rim and the Queen are uncomfortable accepting the royal order, but they finally comply. However, their relationship does not stop at Reproduction, but an intense romance soon blossoms between the two, and in this strong intimate relationship there is no place for the King.