There was no rocky start for this story, from the beginning it was interesting and mysterious. Not only was it smartly written and well portrayed, but the questions it begged to ask of humanity were chilling and hard hitting. Did we as people create the monsters of society? Or were they born as twisted as they appear now? The plot line of this drama was suspenseful, as Lee Hyun and Cha Ji An discover the horrifying truths of their pasts and of the murderous entanglements that connect them with the people around them, we also begin to draw the lines between whom is truly a monster and those who were created through the circumstances surrounding them. Each murder they take on helps us see clearer whom is behind the deeds of the past and how a monster can be made. This type of story telling gives an in depth view into the eyes of the psychotic, and into the eyes of the ones whom catch them. Both the love story and sense of brotherhood also add onto this story. They give personal connections to the crimes committed and the feelings of those affected. The cast was superb. As a person whose never been a fan of Seo In Guk, I have to say I find his acting in this drama to be refreshing and consistently suprising, he has officially gained a new fan, as his portrayal of Lee Hyun blew me away. Jang Na Ra's character Cha Ji An though in the beginning seemingly a dismal obsessive police officer, slowly grew into a deep understanding character whose past pains made her into a strong female character. The second leads, were outstanding. Lee Jun Ho's creepy kindness and oddly eerie vibe throughout the beginning of the drama really set the scene. Throughout every scene he was in I had a huge case of the heebee Jeebies, like, my skin crawled. ***(SPOLIERS)**** (Especailly when he touched his mothers bones in the coroners office. That was just creepy). ****(END OF SPOILERS)*** Min's character was also one of complies creepiness and he was also very attractive, and while I try to stay away from mentioning that in my reviews I felt it just had to be said. Min's character gave us so much undertanding of how children's views and surroundings affect their growth and presence in society. His scenes always stole my attention. The music in this drama had me consistently singing out loud. Especially "Remember"by Dear Cloud, I have listened to that OST so many times since this drama has aired, especially when left with a giant cliffhanger at the end of an episode when I needed to pine over my feelings through song. The OST's was memorable and lovely. This drama consistently had me guessing and asking myself bigger questions. The plot line and cast always blew me away. It so rewatchable and just so well done. I cannot reccomend this drama enough.