I felt like the premise was really interesting and there was a lot of potential for this to become a really thrilling mystery, but it suffers from something that many mid-2010s dramas do, which is that the romance and the attempts to smush the leads together hinders the show's ability to be darker.

The romantic set-up is a very common kdrama one: childhoods connected by tragedy. I'm fine with this, but the ML's story was just so much more interesting and the chemistry with his brother and the serial killer so much more intriguing that all his scenes with the FL felt just so "blah," as if they were going through the motions.

With that being said, the trio — Lee Hyun, Min, and Lee Jun Young — were absolutely the best part of the show. Their performances were very convincing, and there was a lot of tension in all their shared scenes, and I was also really excited to how the story would play out.

On the other hand, I think the individual cases were fine, but didn't really grab me; in fact, they were a little vague at times, or it just didn't that high stakes. It didn't really help that the FL felt very reactive throughout, never really planning or investigating anything until it was right under her nose, both when it came to individual cases and with the overarching plot.

Now, the ending really does leave a lot to be desired. I felt like they rushed through it (which a lot of kdramas fall victim to) and it focused on giving us unnecessary closure for the romance instead of for the more interesting thriller plot.