Story-wise, it was very unique, something that makes your mind question the possibilities of this being true in real life ; or make you confused at times what the hell is happening now? That was how I felt the whole time I was watching the drama. I have always been amazed at how these writers and directors never seem to run out of ideas and I should say, they did it again. The emotions, showed how humans react and how a simple act of kindness or rudeness towards one person can affect so many.

I really like Park Shin Hye in this action/ thriller genre because I have always watched her dramas when she was younger, and she took on a range of characters from very emotional dramas (aka Stairway to Heaven) and a lot of romantic comedies (You're Beautiful, The Heirs, Pinocchio, etc.). This drama showcased her versatility as an actress and her acting would really show years of experience and it's amazing to see her grow as an actress and taking on different roles. I'm not so familiar with Jo Seung Woo but despite that, with his acting in this drama, it shows how much effort he puts and how hard he worked to pull off his character, so I'm definitely going to look up some of his dramas. Sung Dong Il and Kim Byung Chul, just blew my mind with their acting skills. I guess it's true when they say that actors did a great job if they made you feel angry at them as well. Well, if you watched this drama, you'll probably relate to what I'm talking about.

I like the drama's OST. The vibe is new, compared to other drama's OSTs but I think the only word to describe it, is that the music production was fresh for most of the OSTs for this drama.
Overall, if you want a drama that will make you really think hard and take you to the edge of your seat all the time, you should watch this drama! If you want to cry, get mad at someone and feel so many emotions at once, you should :-)