Kingdom of Joseon, ancient Korea. A usurper has conquered the throne. His ministers are being systematically eliminated by a mysterious assassin. An arrogant master swordsman is in charge of putting an end to the carnage.
| Actor | Role |
|---|---|
 Choi Min-sooChoi Ji-hwan | Choi Ji-hwan |
 Cho Jae-hyunYun Gyu-yeop | Yun Gyu-yeop |
 Kim Bo-kyungShi-yeong | Shi-yeong |
 Lee Jong-sooJae-deok | Jae-deok |
 Yoo Yeon-sooOfficer Seo | Officer Seo |
 Ki Joo-bongOfficer Jang | Officer Jang |
| JJeong Seong-hwanJeong Yeo-gyun | Jeong Yeo-gyun |
 Jo Sang-geonKim-in | Kim-in |
 Kang Shin-ilHis Majesty | His Majesty |
| KKwon Hyuk-hoCaptain of Guard | Captain of Guard |
 Kim Se-dongHis Excellency Hwang | His Excellency Hwang |
 Lee Bong-gyuMin Dae-gam | Min Dae-gam |
 Kim Jong-gooHis Excellency Song | His Excellency Song |
 Cho Seon-mookHis Excellency Lee | His Excellency Lee |
| OOh Seung-myeongHis Excellency Yu | His Excellency Yu |
| BBae Joong-sikTae-baek | Tae-baek |
| YYeom Cheol-hoMole | Mole |
| LLee Jung-hakLeader of the Office of Special Advisors | Leader of the Office of Special Advisors |
 Kim Si-youngSook-hyang | Sook-hyang |
 Won Tae-heePrisoner | Prisoner |
| LLee Gi-hoSa-gwan | Sa-gwan |
| JJung In-sookGi Nyeo-deul | Gi Nyeo-deul |
 Kim Seung-ohMu-kwan's Underling | Mu-kwan's Underling |
| WWon Chang-yeonPotter | Potter |