One of the best kdramas I have watched and of course the best out of thriller/drama/crime/action kdramas I have ever watched. As of yet, no other can compare to this one. It has a good amount of plot twists and unexpected scenes. All the gore is blurred out which I thought was very considerate for those wishing to watch a thrilling, psychological, crime-solving drama without having to look away every so often. I feel like this drama also promotes girls in the work that is conventionally for guys, for example, an information specialist as well as being a pro hacker and a bad-ass fighter; which is of course, awesome. I don't normally comment on the bgm but the bgm in this drama suited the scenes very well and made creepy scenes scarier and action scenes more thrilling. The cast was top notch, no arguing with that. Overall, a very smart and brilliant drama.