I haven't watched the American version of this from which it was re-made from so this show is my only reference and I can say that I was pretty disappointed about how this show turned out. The cases are interesting however the way that the story was constructed was way too bland and cliche.

There were episodes that caught my emotions and I was really shocked when they took the route where 'someone dies' which I thought wouldn't however that just what it is. Even the main characters lacks depth on their characters and is more on one-dimensional. It felt like I was watching them 20x on repeat with just a slightly different scenario.

It was normal that most criminals especially serial killers have a turbulent childhood which led them to become a-not-so-good citizen however the characterization of the suspects here can be misunderstood as people having turbulent childhood or those who experience mental health issues are harmful and dangerous people which is not really the case. A lot of people who has mental health problems and experienced abuse are good law abiding people.

As someone who watched tons of crime, serial killing, law dramas, this drama is way below the standards. I still do commend the casts though. I love the Lee JoonGi is here also Lee SunBin. And all the other casts. I just didn't like how the whole story was written. There were no thrill or suspense and the ending is also meh. I invested 20 hours to watch this and unfortunately, I cannot recommend it.