It is a historical court drama set against the background of the Mahan Age. Crown Prince Bo-hae (Lee Seung-hwa) is reluctant to go to the place where the Crown Princess will be selected, because of affections for an unknown woman whom he had fallen in love with at first sight. But because of the king's orders, he goes there. There are two women waiting to be selected. One is Guseulagi (Kim Mi-seon), a daughter of Lord Jin-pyeong (Byeon Ki-jong), and the other is Hwaseonagi (Ko Hyang-mi), a daughter of Hwa Pidal (Kim Seung-ho). He is pleased by the fact that the unknown woman, whom he is in love with, is Guseulagi. But Hwa Pidal, who wants his daughter to be selected to gain power, accuses Lord Jin-pyeong for being a traitor and puts him in jail. Guseulagi runs away, disguising herself as a man. While crossing a pass, she runs into Haemosu (Yang Il-min), named Pig. His father died because of Hwa Pidal's trickery and Haemosu turned into a bandit. Guseulagi and Haemosu steal into the palace and beat off Hwa Pidal and his group to rescue Lord Jun-pyeong. Guseulagi becomes the Crown Princess.