I really enjoyed this drama! The dark tension, the suspense, the careful unfolding of the story lines and the development of some very complex characters all held my attention from start to finish and it definitely impressed me with it's top tier level of quality! The writing (plot, characters, setting, dialogue ... ), the performances, the OST and the cinematography were most often exquisite and there were many moments where a character's loyalty and love for another ... genuinely moved me. I hope that there will be a follow up series but, even if there isn't, this was time well spent. My feelings for each of the characters kept shifting and, for me that made this drama quite captivating. It was a memorable story with provocative leads and intricate relationships. And, I have to say, I'm actually quite sorry that I finished it and it was over so quickly. I wish I'd savoured it a little bit more. So I'll easily rate it at 9.0 to 9.5. I'll be re-watching it in the near future. And I will totally recommend it to you, if you're looking for a high quality, martial arts, historical drama. Honestly it's an excellent drama in all respects.