Let me tell you that this drama put me in tear more than once. As I begun to watch this drama, I did not expect it to be as good as it proved itself to be. It got the perfect mixture of action filled with one of the most heartfelt romances. I admit that it took a few episodes to get into the drama fully and for the plot to improve, but it was definitely worth it. The main couple also delivered amazing chemistry on-stage, not to mention the incredible acting over-all by Hyun Bin. Their relationship felt very normal and believable, it came naturally and they displayed such emotion. There's little to nothing to criticize, however some scenes were unecessary and sometimes made the drama difficult to watch in-between the main plot. The last few episodes were full of suspense and heartache.