Story I absolutely love how new elements of the plot is added with almost every single episode (up till the last episode, can you imagine). It gets you speculating on what actually happened to the characters because the show doesn't tell you too much at once. Plus, it keeps you on the edge of your seat and makes you want to keep clicking the "next episode" button because plot twists appear at unpredictable parts of the show. Very minor romance and some funny scenes here and there. It stays true to the mystery genre, with the characters running around trying to solve the mystery, but hardly any action (in terms of the police shooting and fighting etc). Due to the nature of the genre, the plot may not be quite clear and straightforward for some. Especially at the start, viewers may have to just take the story in first before you get a better picture of what is happening. Acting Amazing acting by (almost) all the cast. One supporting character that came to mind is Ba Woo, played by child actor Choi Won Hong. His role as a kid with autism can be difficult to deliver but he did well in portraying the basic symptoms of the disorder (well, it's a spectrum, so in real life, symptoms displayed by different people will vary depending on the severity,). I thought his acting wasn't awkward at all. Main characters like Yoon Ji Sook (played by Shin Eun Gyeong) and Kim Hye Jin (by Jang Hee Jin) delivered their emotions well throughout the show. Personally I could feel their desperation and frustration. However Moon Geun Young who played the leading role as Han So Yoon, and Ohn Joo Wan who played Gi Hyun, felt rather weak to me. It could possibly be due to the nature of their characters and the way it was written. Cast I thought the casting was alright. They got a variety of people to play different and diverse characters for both major and minor roles. For instance, Yook Sung Jae's character as a young and eager police officer suit him well. The fortune teller, the rowdy female students, the suspicious principal at the art school all fit the characters they were playing. Music I didnt not recall anything memorable. Rewatch value Even though I thought this drama is brilliant, I think it is quite difficult for anyone to rewatch it unless you feel like you missed out certain important parts of story. In all, I feel that this drama is a great crime and mystery drama. I highly recommend it to everyone who is into this genre. However if you like lighter dramas, this may not be for you. The lack of romance and comedy makes this show quite heavy. Also, take note that this show may be triggering for some viewers (implied rape, no real scene if I'm not mistaken).