Story: I had high hopes before watching this after reading the summary, it seemed like just my kind of tale. A dark and complex story classified as a mystery and a psychological thriller? I was excited to see what this show would be about, and I wasn't disappointed; at least not entirely, but I'll get to that in a bit. First, I want to talk about all the good that this show is, because I loved it. There was not one moment in which I got bored watching this drama, because it lived up to it's genres, especially as a thriller. I was on the edge of my seat in every episode, just wondering what would happen next. If you like complex stories that gets you thinking, this is it. There was so much happening, but everything happened for a reason, and not just for the sake of making things interesting. It did that on its own naturally. This drama focused a lot on the mentality of it's characters in a realistic way that made it a great psychological thriller. Each character had their own story and their past which made me love all of them in the end despite disliking a couple at the beginning.The mystery aspect to this show was well planned out as I was just barely able to keep up to speed. While I had my suspicions pointed to certain characters and thoughts on what would happen, I was never completely sure what direction the story would take until it made itself clear, so there was always a surprise around the corner. While I loved all of that about this show, it didn't live up to its full potential near the end, which left me a bit disappointed. It started to dwindle a bit on its realism and characterization that it built so well on at the beginning. There were a couple of conflicts that were out of character which I found ridiculous, and the part where they celebrated was a stupid decision considering the situation. The whole thing could have ended sooner as well, but I felt that they dragged it out a bit too far. While it frustrated me to see these irrational and unnecessary things happening, it didn't ruin the show for me. It didn't bother me too much in the end as everything else about this show was amazing, and It was entertaining all the way through to the end. The last episode especially makes up for it in my own opinion. Acting/Cast: A lot the actors in this show ended up starring in popular dramas today for a reason, their acting was superb. The cast really managed to bring their characters to life, I found myself really getting into the story more because of this. Each character was special and individual rather than just being there for the sake of the story to take place. I have no complaints on this, the cast did a great job. Music: I loved the OST, it fit the shows vibe perfectly and made a lot of it's moments. I especially love how the used AC/DC. I laughed at first, but it fit the scenes well! Re-watch Value: It's so complicated that I might just save this show as a memory, re-living it would just give me stress. Maybe one day if I'm up for it though. Overall: This show definitely isn't for those who can't or prefer not to follow a complex story. If you like a good mystery and a well made psychological thriller that'll keep you on your toes, then I'd recommend this to you. If you don't like the drama at the beginning, decide how you feel about this show on the 5th episode, that's when the show really peaks.