I just finished watching this drama about a couple hours ago, and I had to say that it was the best one I have seen in a while. Most Korean dramas are receptive, so I was surprised when JTBC came up with this type of drama. I was interesting since the first episode, trailer, and the plot. I am so glad I have decided to watch it because ever since the beginning I was hooked completely. The cinematography was amazing. It reminded me of Vampire Prosecutor, which was another good drama. I was surprised at first that the one that directed this one was the one that directed I need romance 2. His directing was amazing and I was shocked. This drama was different from the one that I've seen about the undercover. We get to learn why the actors did what they did and we get to learn about the drug world and how corrupt the government is. Jung Kyun Ho was amazing this was his project after serving in the military and he picked the right drama to start in. The other casts were amazing too. My favorite OST was Hurt by Kim Yong Jin and Everyday Jun Jung Hee. I would definitely watch it again. If you are thinking about watching it because of Jung Kyung Ho you won't regret it. You will learn a lot by watching this drama because the world is not as simple as you think it is.