The crown prince of the Goryeo dynasty, Won, appears innocent on the outside but harbors a yearning for conquest within his soul. One of Won's personal bodyguards and a dapper royal by the name of Rin, he is best buddies with Rin. Friendship blossoms between these two young men and San after she enters their lives as the single daughter of the richest man in their country. An adaptation of Kim Yi-novel Ryung's of the same name.