Princess Se Ryung is the headstrong and forward-thinking daughter of Grand Prince Su Yang, who is determined to be King. She falls in love with the son of his mortal enemy, and their romance gets caught in the crossfire of her father's quest for the throne.

Park Si-hooas Kim Seung Yoo
Moon Chae-wonas Lee Se Ryung
Hong Soo-hyunas Princess Kyung Hye
Song Jong-hoas Shin Myeon
Lee Min-wooas Jeong Jong
Lee Soon-jaeas Kim Jong Seo
Kim Yeong-cheolas Prince Suyang
Uhm Hyo-seopas Yi Gae, Seung-yoo, Jong and Myeon's former teacher
Kim Yoo-binas Kim Ah-kang
Choi Mu-sungas Ham-gwi