This drama started off really great and thrilling but after a couple of episodes it sometimes got really boring. Since it focused on the action, a lot of the same things happened but just with different people. The story is full of mystery and I really like it but sometimes I felt like it was dragging a bit. The whole cast is great and I really like them all. Si Won is getting better and better every time I see him act. He is really good. I'm kind of disappointed since I was kind of expecting a lot from this drama but for me it was just a bit slow. Sometimes I thought that it didn't even need 16 episodes. So the drama overall is ok.