A chaotic time period in which the once Confucian society was threatened by an attempted Japanese invasion. The film is centered on an elite band of imperial guards hired to protect the old ways.

Choi Ji-hwan (Choi Min-su) and Yun Gyu-yeob (Jo Jae-hyeon) make the backbone of the group, but unforeseen circumstances cause Yun to turn on Choi, the latter of which disappears from the scene after having been revealed as responsible for several murders.

Choi turns up with his own army to confront Yun and prepare for the final brutal Epic battle, which will decide the fate of the whole country.