Story- I think that the writer(s) of this drama was an absolute genius! Not only was it unique but it had me really tense THE WHOLE WAY THROUGH. Not one episode was boring and that's what I really like about this drama. I've skipped quite a lot of dramas after watching 1 or 2 episodes because of how slow the story moved but not with this one- no! This one I just HAD to keep watching. The endings of each episode had cliff hangers which practically forced me to. Of course there were humorous moments as well as serious ones. The main storyline was really intriguing and captivating as the main culprit's motives are revealed one by one. There are also very shocking revelations. Acting/Cast- As for the cast, I think that they were picked out very well. The actors played their characters to their full potential. Especially So Ji Sub who was the main character of this drama, you'll have to watch it to find out why :P It's my first time seeing him act and he has left quite a good impression on me. The actors who played in the police force were also amazing! Two characters that you will remember are the Mad Cow and Boiled Potato hehe And the bad guy, he was always a step ahead of the police force and this made the story really exciting. Gang Mi was the female detective who made a very impressive lead female. She wasn't one of those girls in those dramas who just sit there looking pretty- she went out there and did everything she had to do. There are many characters who will definitely be outstanding as you progress the drama series. Music- Hmm.. the most memorable ones are the piano soundtrack and the phantom of the opera song. I think that they could've used more songs however the ones that they did use were used VERY effectively. Re-watch Value- I wouldn't really re watch it as I already know what happens in the end. But there is a chance that I could because of how well this drama was put together. I can't really say much about what I disliked particularly because there was nothing that disappointed me. There isn't much romance but I wasn't really expecting any from the start so I wasn't let down. This review doesn't do much justice to the drama :P I suggest you go and watch it now! If you don't, you are going to be missing out, what to me is, the best mystery drama of 2012.