Follows Joseon's greatest assassin during his journey on his deadly last mission.

After a deadly, long-dormant health condition surfaces during a mission, Joseon's most lethal assassin goes into hiding to seek a cure without revealing his identity. But upon witnessing a ruthless campaign of terror against local villagers, the region's deadliest killer comes out of retirement in order to exact his own brutal brand of vigilante justice.—Canon y mus