On doing some follow up research this movie is based on a true story?! About a 70 year old South Korean fisherman who murdered four women between September & August of 2007 in Bosung, South Jeolla Province, South Korea. I... did not know that when I was watching it... *shudders* I was in the mood for a scary flick and happened upon this. Not recently, but in the past year I had watched this movie called Gone with Amanda Seyfried. The story-lines sound almost identical. Younger sister gets taken, older sister goes to find her on her own because the police think she's crazy. So I was expecting a movie like that; some jump scenes, a little who-dun-it. What I got was a freaking intense, gory movie. The plot was great and the actors did a fantastic job. Obviously something like this where you already know what happens is hard to re-watch with the same effect. (Although I don't think I'd ever want to re-watch it anyway) because man was the killer sick and twisted. So if that sounds interesting, give it a go.