http://www.youtube.com/watch?v=Q984rlVXO3s The assassin genre is something that always appeals to me, but I found the premise of this story to be very interesting. Let's all hope that the Weinstein's don't pick it up and cut twenty minutes of it. Here's how AsianWiki described it.
A 5 member gang, led by Seok-Tae (Kim Yun-Seok), kidnaps a baby boy named Hwa-Yi and raises the baby like their own son. The baby boy is now 17 years old (Yeo Jin-Goo) and has turned into a lethal killer. Taking part in his father's gang, Hwa-Yi learns about his own past. Hwa-Yi pulls out his gun to find out who he really is.