After a fateful encounter turns him into a bloodthirsty vampire, Mok Yeon loses his beloved sister to the hypocrisy of a corrupt righteous faction martial artist. Consumed by rage and driven solely by vengeance, he discards his former humanity and embraces the shadows. Armed with deadly vampiric abilities and blood-fueled powers, Mok Yeon sets out on a ruthless crusade to tear down the hypocritical martial arts world piece by piece.