I would have given this drama a higher score, but I got bored. I read the history of Prince Sado and the writer did a good job mixing the historical truths and rumors. I enjoyed the first 14 episodes the most, then they traded Kim Yoo Jung with Yoon So Hee and the story line also changed. It became more political and boring. I don't understand why they changed actresses when they basically dropped Ji Dam's story line. I get it if there had been more of a mature story line, because Kim Yoo Jung is only 15, but I didn't see anything that she couldn't have done believably. It was disappointing. The best part of the story line is that the king and prince are consistent through out. The ending was good, considering. Han Seok Kyu is an excellent actor who made me hate and love King Yeong Jo equally. Above the boring politics story line is a father/son relationship that was volatile. The conflicted thoughts and emotions Seok Kyu portrayed was palpable. Lee Je Hoon is unexpectedly good as Prince Sado. He was strong, conflicted, sad and did what he needed to do to realize a world for the citizens to the very end. I wonder if he was happy even once in his entire life. I believed him and that is a tribute to his acting. I love Kim Yoo Jung. She is a wonderful actress that only seems to get better as time goes on. They shouldn't have replaced her. The other actors are good too, but for me it was all about the father/son relationship. The music is appropriate. I will never rewatch this. If you favorite genre is Seaguk, then you will certainly love this drama