If you've watched Korean thriller movies long enough, you are used to their twist and turn. This movie itself started with a joy ride of thrill, then murder, revenge, and ended with more questions. I hate to dislike this but the mental torture of watching the antagonist taking crowns of victory makes me wonder the director has never wanted it to end happily. The direction of the plot is just twisted. If you're in for such obscurity, you will be able to enjoy it better than I do.