I never saw the movie but I was watching a show recently that was reviewing some Asian movies. All I can remember is that there was a scene where the Antagonist comes face to face with another character (possibly a child but I'm not 100% sure about it) at the end. I think the character knows they are face to face with the antagonist but says nothing.
I know the description is not helpful but its all I can remember from the review.
The movie is between 1998 and 2011. Its possibly Korean. It may be quite popular as some of the other movies that were reviewed included oldboy and battle royale.
Does anyone have an idea what it is?