First off, let me reiterate that I am fan of both Choi Woo-shik and Son Suk-ku. I think that their acting was very well done and I hope to see them working again in another drama or movie.

That being said... I don't know what I was expecting but from the trailers, I thought that maybe it would be more supernatural in genre. That his first kill made him somehow able to "see" the crimes of the people he came in contact with. If you ever watched the Memorist, you'd know what I'm talking about. But alas, it wasn't so. It was more that Choi Woo-Shik's character, Lee Tang, just becomes a vigilante at best with some kind of small intuition to feel out evil people.

I think one of the problems with the storyline was basically Lee Tang's character development into a serial killer. One minute you see him like a regretful and tortured accidental killer and other times, just as a serious murderer. He goes back and forth like this and somehow it didn't allow the storyline to flow smoothly. Maybe that was part of the paradox they were aiming for but it just didn't work. Sometimes he's a coward in hiding and other times he's a cold-blooded killer. I don't know if the second killer was worth bringing in. Also, the nude sex scene was like a Michael Bay-Netlix-Let's-Show-Some-Boobs-And-Sex thing. Why was that even in there? Added nothing to the story but just degradation of women in film as usual.

Overall, it was good enough that I binge-watched this but I don't think I'll rewatch it.