Looking for an action/mystery/thriller like drama? This fits all the criteria and is definitely worth the watch as this show was one of the best I had seen! Story The plot was truly amazing- how a former cop who was fired due to his violent history recruits 3 top-notch bad 'boys'; a genius, a contract assassin and a gangster who work together in order to solves crimes and reduce their jail sentence. This drama did not have any dragged out parts and had always left a 'on-the-edge' feeling after each episode. There were plot twists in this drama which made it even more interesting and surprising to me since it throws you on the edge and completely makes you look at a different perspective. This drama was directed so well as it was never a dull moment! Acting/Cast The directors sure did a fantastic job picking the actors/actresses as I cannot think of any other people who could portray them as good as these people did. Like everyone, my bias would be Park Hae Jin; and not only because he was cute; but his character was so complex- a genius with a troubled past may sound cliche, but his character and his situation truly made me feel for him and how his life was always completely unfair for him. Of course, the others were also the best! Yoo Mi Yeung (Kang Ye Won) truly made me angry at times and wanting to bash her head in; however this indicated that her actress was truly doing a great job! She was the only main female lead which worried me since most of the time; the reverse harem would lead to everyone having feelings for her; but I was pleasantly surprised that this drama stuck true to its main genre and there were absolutely 0 romance! Music It's been a while since I completed this drama, however I remember the music wasn't that bad; but I wasn't able to remember a lot of them. The soundtrack was appropriate and was perfect for most of the scenes though! Rewatch Value? Definitely! If I'm craving for some crime mystery drama; I would definitely come back to this; however it will depend whether I'm feeling up to becoming annoyed with some situations. Definitely not because of the characters; but because of their circumstances that would make me want to bash my head in. Conclusion? It's only 11 episodes so it's pretty short! Definitely worth a watch though!