This Drama is more like a Dark Symphony... Although it's Dark but it still is a Masterpiece. To be honest I started this drama because it has 3 of my favorite Actors Sung Joon, Jung Wook and Woo Bin, even the description of the Drama was a turn off since I tend to enjoy Romance-Comedies more than Mystery-Psychological K-Drama BUT THEN THIS DRAMA HAPPENED ! and my love story began... I can bravely say that THIS IS THE BEST KOREAN DRAMA YOU WILL EVER WATCH IN THIS UNIVERSE !! Yeah, it IS that cool. You might think I'm exaggerating but honestly I'm not, I slept on it so I'm not as emotional and overwhelmed as I was last night, anyway back to the drama: Story: The story is so out of this world, it is NOT your typical Psychic trying to kill People... It's a whole new level of insanity. It begins slowly and you might think the story about the letters is just about it and is too stupid to continue watching but as you go on with it the real story unfolds out of nowhere. The base of this drama is a question "Are Monsters Born or Made?", I myself started to wonder what the answer is since Ep1 and that's one of the biggest reasons I continued this drama (besides the bunch of f***ing HOT GUYS *__* ) Acting\Cast: PERFECT ! You'll find lots and lots of Mentally Disordered characters in this Drama (practically all of them LOL), the Cast conveyed that feeling Perfectly, each Actor\Actress fitted his role Perfectly and each Emotion was delivered Perfectly, displaying Fear, Hate, Slyness, Weakness isn't as easy as Love and Affection and this Cast just NAILED IT XD Music: PERFECT ! I don't know if the word "Perfect" loses it's power the more you use it but I simply can't find a better word. I wanna go marry the person who did this drama's Music ! It fits every f***ing second of it ! Every scene ! Every move ! I seldom experienced such joy in K-Dramas, they simply do some background music and that's it but HERE it is different, it made it more of a symphony. As one of the reviewers said I could watch this drama as pictures and music alone and still be satisfied ! It is that great. Rewatch Value: I know I gave it a 10 but that's because I wanted to raise the Drama's ranking, I'm sorry for not being honest but there is a very good reason why.. Simply because now that I've watched it I know what's behind the corner in advance, no fun, this drama is all about surprises and unexpected turn of tables so it's very hard to watch again. OVERALL: WATCH IT NOOOOOOOOOOOWWWWWWWWWW YOU WILL NOT REGRET THIS