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A secret agent tracks a sadistic serial killer, blurring the line between hunter and hunted in a brutal quest for vengeance.
Why people love it: The movie’s relentless cat‑and‑mouse tension keeps viewers on edge, while its graphic realism heightens the impact. Choi Min‑sik’s chilling villainy and Lee Min‑ho’s determined hero create a memorable duel. It’s praised for pushing the boundaries of the revenge thriller genre.