I know that this is old and there are a lot of reviews for this and I highly doubt my review will get read but it all depends on if people want to see the most recent reviews or just the helpful ones but if the most recent reviews has been chosen you may want to skip mine because this will heavily contain some spoilers.

First: Korea....stop blurring out the knives! We know what it is! Why blur out a knife but show guns as clear as day???

I came to this drama because so many viewers reviewed this and gave it high marks. I'm assuming this got high marks from the eye candy, lol!
If anyone has ever read my reviews one will know I watch these dramas to see who's great at martial arts and the action that comes with it. I also watch for the chemistry and yes 'da bromance'!!!

Sadly enough I got one out of the three. The main character who played 'Doc's Son' was awesome. I remember this person from 'Life On Mars'. In my opinion his character was the only one that I liked.
The second male lead got on my ever lasting nerves! He was too bossy and pig headed for my taste. He could put together all other scenarios but he couldn't piece together the main goal he was trying to get to. I didn't feel he portrayed his character that well. He also didn't meld too well with the other characters. I don't know if that was the writer's choice or not.

The chick that played Soo Min really got on my nerves. Her facial expressions just bothered me. It was like she had too much work done on her lips and her pupils were just too big! They say a camera adds ten pounds but this poor girl's skeletal system showed a lot! But I must say she could definitely run in those platforms.
The females in this dressed as if they were-well-let's just say they dressed as if they were in the 'make it rain' profession that also made it hard for me to watch. She played that dim witted love sick puppy that I've come to loathe in Korean dramas. It's why I tend to stay away from dramas that involves romance.

The other female who played Jin Sook was OK. There were moments where I rolled my eyes but then she was a lot better.

I'm trying not to make this long winded but to me this series was all over the place. There were a lot of undercover agents in which one was introduced as an agent but was never explained why they were called an agent. It was just thrown in several episodes I'm guessing to save space. There was also a few episodes where the writers took a character in another direction. It was so out of the blue! I guess when you have to come up with 20 episodes you have to keep it going no matter what.

I kept watching this because I didn't have anything else lined up. The regular shows that I do watch will be coming to an end for the summer so I will go and watch those and come back to my Korean dramas. Hopefully I will find something better than this. I still don't know how this got high marks.