While in medieval Korea, a young girl sets out to revenge the betrayal and the death of her mother. But therefore she must face one of the most powerful men and warriors of the Goryeo Dynasty.
| Actor | Role |
|---|---|
 Lee Byung-hunYu-baek / Duk-gi | Yu-baek / Duk-gi |
 Jeon Do-yeonSul-rang / Wol-so | Sul-rang / Wol-so |
 Kim Go-eunHong-yi / Sul-hee | Hong-yi / Sul-hee |
 Bae Soo-binPoong-chun | Poong-chun |
 Sung Yoo-binGam-cho | Gam-cho |
 JunhoYull | Yull |
 Lee Kyung-youngTeacher | Teacher |
 Kim Tae-wooJon-bok | Jon-bok |
 Kim Su-anGu-seul | Gu-seul |
 Kim Young-minKing | King |
| GGuzal TursunovaJu-gil | Ju-gil |
 Moon Sung-keunLee Eui-myeong | Lee Eui-myeong |
| KKim Won-jinFighter | Fighter |
 Zhang DongNot listed | Not listed |
 Lee Sung-wooYu-baek's bodyguard | Yu-baek's bodyguard |
| SSin Sam-bongFifth Ranked Officer of Royal Security Forces | Fifth Ranked Officer of Royal Security Forces |