bree1981’s review published on Letterboxd:
This is a pitch black Korean revenge chiller directed by Jee-Woon Kim. A brutal tale of two men, one a monster, Jang Kyung-chul (Min-sik Choi) is a twisted serial killer, filthy, psychopathic, more of a creature than a man. The other is Kim Soo-hyeon (Byung-hun Lee), fiance of a murdered girl and a top secret agent, he vows vengeance on the killer and sets out on a cat and mouse game, not to bring him to justice but to make him suffer in unspeakable ways.
This is a disturbing movie and the unsettling opening sets the dark tone that barely lets up throughout its 2 hour run-time as Soo-hyeon turns into a vicious monster himself as he dispense's his own kind of justice. Both actors are superb in there roles with Kim letting his camera linger on there faces of each man, both wearing the same ice cold stare as they hunt there prey.
The film also gives us some tension soaked, heart in mouth set-pecies and buckets of grim, bloody violence and although it won't be to everyones taste the horror crowd will definitely get a kick out of this one.