Ever since I learned about this series being made, I've been looking forward to it. Not just because the lead was played by Kim Namgil, but also because it's a story about the first profiler in Korea. And I have to say, I really liked it. But since this drama was based on a real person and real cases, safe to say anyone watching the drama need to prepare themselves to revisit some very well known and familiar cases in which a few had already sparked other dramas like Signal. And in particular, the drama would cover some of the most notorious serial murder cases that once loomed over the people of South Korea.

And I have to say, as much as I've yet read the original book, we can already see how important criminal profiling is in solving difficult cases. Especially with the common occurrences of the use of violence to extract confessions, (which was quite a common scene in past dramas that may reference to real life situations in the past) that can lead to some innocent victims being falsely convicted and allowing the real criminal to slip away unscathed. To people who were quite curious to learn how criminal profiling started in South Korea as well about the many criminal cases that once haunted the country which includes some notorious serial murders, this drama was a good one for you to dive in. Though, as much as the drama is based on Kwon Ilyong's book, there would still be some details that may be fictionalised and dramatised to make it more interesting.

Kim Namgil gave a great performance as Inspector Song Hayoung, the first criminal profiler from the Criminal Behavioral Analysis team. You can really feel the struggle faced by Hayoung as he attempts to read through the minds of notorious criminals in order to give the families of victims of criminal violence some closure as they put a stop to the crimes that were commited by these criminals. In order to do their jobs well, these officers will have to learn more about the criminals they're studying and the task wouldn't be for the weak minds. This drama would give as a glimpse of what it used to be like when criminal profiling hasn't yet be a common occurrences and allow us to better understand how tough the role of profilers were and appreciate the work that they're doing.

The drama had some pretty haunting ost, in which it reflect and enhance the sombre mood and seriousness of the cases. It really felt as if you were being brought back in time when these cases had happened.