Tae-sik, once a feared ′Hit Man′, loses everything when his boss dies and his gang crumbles. After his closest brother-in-arms, Gi-sun, is murdered in a violent power struggle, Tae-sik vows revenge. With help from a corrupt detective, he meets Mae-hwa, a woman who holds crucial clues to the killer’s identity. As the two grow closer during their search, Mae-hwa’s probing questions put her life in danger—forcing Tae-sik to risk everything to save her.