I have mixed feelings about this drama. As much as I want to give really high rating, I feel reluctant. Probably it's because i felt a bit boring and distract near the mid of the story. But, overall, it was a great story with AMAZING cast and music. For the story, I am a great fan of noir-genre drama/movies. In this case, it has a great story line; it has revenge, undercover, friendship and love. One thing I disliked was that there were too many boring political dialogue almost in every episodes. But, action scenes were EPIC; I LOVED them. Acting/Cast: JKH is an amazing actor; he portrayed Doctor's Son/Jung Shi hyun character very well - so dark and mysterious. Nam Gyu Ri was gorgeous and I like her but her acting - I didn't find it impressive. Supporting actors were also good, I would say. Music: I LOVVVVED the music - "Hurt" and also the last one, "Everyday". And also the instrumentals also helped the drama in perfecting its dark theme. Rewatch value: Not sure I will rewatch it again. Overall, a great drama, you should watch it if you wanna take a break from typical melodramas.