I really liked this movie. It is a film noir style so it's not for everybody but, even if you are not into this kind of "heavy" eerie scene, if you bond with the protagonist on the beginning the movie flows nicely.
Yoo Ah In is amazing, he transpire his character as he belongs to that environment, you'll feel Jung-su's contained pain and why the easy attachment to Hae Mi ... Very nice acting!
Jong Seo is fantastic and her panther like moves makes her acting stands out, it surprises me that was her first movie because she is very confident.
Steven Yeun with his easy smile and demeanour catch your attention and his role in this movie needs attention indeed!

The whole movie takes you to an unexpected end what was very good that made me want more!

Give a try...