It's a crime/thriller series that did not involve much car chasing and gunfights. It's simple but powerful. Every episode was mind blowing. This series may be weak for some, it's not for me. Every line that the main character delivered was descriptive that it guided me as a viewer to imagine the personalities of every serial killer. There were redundant pattern on how things will be revealed, yet there were also novice turn of events.

It's a legendary series in a sense that it narrates how Korea had its first criminal profiler and its team. They experienced different challenges like other newly established group or businesses. I will certainly watch the second season if the producers will decide to make it.