Ancient Korea, 1728. Swordsman Kim Ho, guard of King Yeong-jo of Joseon, is demoted and sent to work in Uigeumbu prison. When night falls, the prison is assaulted by the master warrior Do Man-cheol and his powerful henchmen for the purpose of freeing Lee In-jwa, who has been condemned to death for rising up in revolt against the king.

Jung Hae-in
as Kim Ho

Kim Ji-hoon
as Lee In-jwa

Lee Won-jong
as Man-seok

Jo Jae-yun
as Do Man-cheol

Hong Soo-ah
as Yun Seo-yeong

Ryu Tae-joon
as King Yeong-jo

Hong Seung-jin
as Yun Ju-sik

Kwon Hae-sung
as Choe Jung-gu

Lee Kyu-bok
as Yu Il-un

Jeon Seong-ryeol
as Kim Seong-sik