This isn't your usual fast-paced serial killer drama series. The story is focused on the development of SK's profiling department, their struggles to show that behavioral analysis can be a great help in catching serial killers. I love how the series showed the emotional turmoil you go through when you have a job that requires you to catch the filthiest scums of society.

The acting is just WOW! Of course, the leads and supporting cast gave a really good performance but my gosh, those who played the serial killers were just phenomenal to me. They were creepy, as in so creepy. They were so believable. I'm so amazed.

I really like watching dramas with serial killers and this is one of the best I've seen. It's different but really good. I hope you will give this drama a chance. If you read ALL the reviews, many reviewers gave this drama a high rating. Those who didn't like this drama, well... maybe they were just expecting something else.