I didn't know what to expect when I first started watching however I wasn't too disappointed . ML acting was on point but the FML acting was predictable as it's really similar to all her previous character on shows I watch. Same crying face all the time, cry, put hand in forehead, cry, cover face with both hands, just predictable and slightly disappointed in her acting. Although I thought ML acting was on point, his character is just boring, naïve, innocence boy who got a sense of justice and bravery because of a girl. Their chemistry was strange, weak, and cry but not too unpleasant. Also the FL often bend her duties as a historian to fit her objective but refuse to see the outcome of her action, time and time again she is saved by her colleagues, but later says " I won't be able to respect you as my senior" because one of the historian took his job seriously and refuses to bend in order to match what she considers justice.

My favorite character were definitely the side characters, Officer Min Woo Won, Crown Prince Yi Jin, and Song Sa Hee were infinitely more interesting to watch than the mains. they had strong convictions and went after them, they have strong sense of moral and justice considering who their parents are, however unlike the mains, they know that their actions have consequence and prepare for them, They don't have this unrealistic point of view of the world and understand the benefits and the negatives coming from rich families. Crown Prince Yi Jin and Song Sa Hee had better chemistry than the mains even though their relationship was barely showed. The FML had better chemistry with Officer Min Woo Won than she did with the ML.

Even Min Ik Pyung was a better character than the mains. He was interesting to watch, his ideal world was different than the previous King and went to create a place were his ideals were formed. He often gave the King really realistic advice and often for the better for the country not just himself. He wasn't the kindest person on the show but I have to really respect for he did what he thought was the best for the country.

Over all it was a good show but a lot of fillers in my opinion. the show could have been 6 episodes shorter and it wouldn't change the story.

If people ask me if this show is a must watch than no. It's not one of the better dramas but if you want a easy watch than I say go ahead.