The plot is quite unique. so If you are looking for some drama to keep you motived watching this is your drama. You will enjoy it a lot - at least up to 12 episode. Lee Jong Suk did a great job. Also Kim Eui Seong did, mainly in the last chapters. But... there is many problems with the storyline and the interpretation of the main actress. These problems don't make of this drama a terrible one, but is enough to not give to it 10. The story works well, more or less, until episode 12. Until this point is one of best drama of this year, after that is a very regular drama. It is because the drama begins to lose direction and logic. The end is more or less expected. I don't like the behaviour of Oh Yeon Joo, each episode she was becoming increasingly aphatic and annoying with her actitudes. In fact, the most important criticism is the poor performance of the main female. Several scenes lost even more their meaning by the way she played badly some emotions. Park Soo Bong has the worse lines of dialogs of all drama. I did not see him again.