This is the second drama I saw and fell in love with Lee Min Ho immediately. This show came very useful to me when I was idle and depressed because I had nothing else to do on a lazy weekend. The story line and plot were engrossing right from the first episode. I loved a political thriller. It had amazing action and marvelous performances by Lee Min Ho and Park Min Young. I think they are the best pair of any drama I have seen so far. Most importantly, the characters were as good as the actors. This show has the best characterizations I have yet seen in a kdrama. The guy isn't a jerk and the girl isn't lacking in brains or pride. I love that she doesn't need saving from a guy every time because she can fight for herself pretty well- both physically and emotionally. I wish we had more strong female protagonists like Kim Na Na in all kdramas. If that happens, kdramas would be unbeatable. I was constantly interested in how the revenge would take place and how each operations would be carried out. I was excessively bored because of the plot of the sick mother. The show had much interesting things for me to care for, so I don't think it was a necessity. It was just a plot device for the emotional factor to lure female viewers. Other than that, it had a great ending and I never felt let down. There were some dull moments here and there, but it was never beyond my patience to skip it altogether. I recommend this show to everyone who is tired of cheesy romances in dramas.