What is it about South Korea and revenge films? My overriding distaste for all but the most thoughtful and daring revenge movie largely confines my genre excursions on this subject to the national cinema of the country (as well as the work of Quentin Tarantino and the odd film like the Coens' True Grit). Perhaps South Korea's long history of exploitation at the hands of other nations -- ending only in the last half of the previous century and gaining that independence at least partially through the intervention of Western nations -- is the impetus for the desire for payback. Now that South Korea is a major economic presence, maybe they want to show others what they're made of.I Saw the Devil, the latest by Kim Ji-woon, does not stand with the best, most insightful genre film Korean cinema has to offer, but it successfully blurs the line between hero and villain with a masterfully gory portrait of all-consuming vengeance that, to its credit, will probably revolt audiences looking for a visceral kick even more than the deliberately repulsive films of Park Chan-wook. The story of a stoic cop seeking revenge against his fiancée's killer, I Saw the Devil plays like what Christopher Nolan wishes he could have done with The Dark Knight: it takes the conflict between a psychopath and a preternaturally skilled crime fighter and grinds the pieces together so violently that the ostensible hero truly is brought down to the evildoer's level.