It is a fictional historical drama about the story of King Seonjong who ascends to the throne due to a rebellion, and Lee Tae who becomes the King after him.
The drama had a good selection of cast with decent varied performances. Jang Hyuk working double and triple shifts here. It had some interesting characters, especially Gye Won which I feel we didn't get enough of him. While the story may have been fine for the first half but it took a worse direction in the second half, losing whatever interest and build up it had previously. The keyword here is "odd" regarding the state of the production. Odd and questionable choices of the soundtracks, some of which didn't fit. Odd and questionable shot compositions and editing. Some shots had slightly different lighting or color grading of the same scene. The drama is filled with very long takes/shots that were too annoying after the 3rd time, it came off as a poor attempt in trying to mimic film, most of them didn't hit right. The only highlights of this drama were the intriguing 1st half and the character Park Gye Won.