I'm french and this movie have quite a reputation in france. And usually i'm a bit disapointed when i heard people were shocked by a movie when i see it. I'm used to watch korean noir movies or serious subject movies. But here... i was so unconforable watching this, because it is completly realistic. Not that it could happen, but that it is happening somewhere. The actor are marvelous, the tension is great, just watch it, but not alone, don't look what it is about before, just enjoy the pain that you will get watching it :)