I found it hard to follow at times. It could be because the subtitles kept saying Book Source; it took me a while to catch on to that being the literal translation of the boy's name.

Many of the reviews skip over the fact that the girl-child was hit by the car because she was escaping her abusive father; it's not like she was just la-dee-dah-ing along the freeway on a foggy night and accidentally got hit.

In fact, the lifelong effects of child abuse is the story. Choi Hyun-soo tries to cover up the accident because of his strong fear of retribution, something he learned at the hands of his abusive father. His actions mirror the young girl's as she tried unsuccessfully to cover up her misbehaviour and pays the price for it. And Ahn Seung-hwan, also having been abused as a child, developed into an empath - another trait typical of abused children.

Don't let the blood and guts distract you; this is a type of psychological terror that plays out every day, all over the world, in real life.

Incredibly good thriller. The story follows a man who hits a little girl in his car, the girl was running from her wealthy abusive father who was probably going to kill her anyway. But, the death enrages the father, pretty much because she died from someone else's hands. The way the filmmakers have made this is beyond anything Hollywood is creating and for me is the future of cinema. The camera angles, use of slow motion to create emotion, the soundtrack, and the performances all equal a great piece of art.

A tense, psychologically fraught Korean noir. Didn't expect it to be this good, to be honest. A lot of reviews claim it's a mixed bag, and while I can see why, I'm glad some of the film's problems affected me a bit less. There's a lot to like here, especially regarding the film's controlled sense of impending doom, which reflects in its relentlessly gloomy atmosphere. Visuals and soundtrack are on point and effectively convey that emotionally heavy aura that Korean thrillers are known for.

The film's plot is almost classic noir but injected with numerous flashback sequences and designed to eventually transform into a slightly different, more direct type of thriller. It's all directed and acted in a natural way, if a bit heavy handed at times, with many nighttime scenes having an almost mystical look. Ryu Seung-ryong and Jang Dong-gun carry the story very well, with the former being a more complex, centered figure, while Jang is a more conventional devilish villain. Both of them are given enough screen time to appear more than just genre archetypes, especially Ryu's haunted character whose dreams and hallucinations take up a large part of the film. These lengthy sequences are one of the reasons why the film wasn't received very well, but while they weren't all that necessary, I felt that they added weight to Ryu's character that magnified the film's emotional climax.

There's also quite a bit of symbolism here, a lot of it obvious but mostly well handled. The whole film is dark, gloomy and filled with miserable people doing miserable things, and if that's your thing then you'll probably enjoy this film. I know it kept me glued to the screen absorbing every minute of its 2-hour runtime.