I watched this drama when it came out because of N (I am a Starlight what can I say), that time I didn't watch a lot of dramas. But this drama blown me away. It is one of the best series I ever watched. I literally recomend it to everyone I meet... This drama has a lot of layers. It starts with some murders and a crime theme but as the story goes, it goes deeper and deeper. It deals with a really heavy and important topic, which i think is a tamboo. They are really careful and they approach it with a objective way. In a lot of parts the characters and the viewers are trying to choose what is worst, if the first justify the second or not and this moves the plot. The drama doesn't take sides and we sometimes sympathize with the murderer, because even they have their one story to tell. No one is totally innocent for something, even the psycologist or the detective who try to solve the cases.

It is a really dark drama with great suspense (I remember I couldn't watch it at night). There is no filler or missing. Everything is there for a reason. The mystery is built really greta, I think this drama has to become the textbook for the mystery thriller genre. it is one of best series that I ever watched. This drama is the reason I started loving asian crime/mystery thrillers. I think East Asia are the best in this genre, especially Korea and Japan. For so many years I didn't find a drama that can come close to this.

I am really dissapointed that this is a relatively unknown drama, maybe because of its story and it was only in korean tv.