This is a great and very entertaining fictional saeguk. Although there is a romantic storyline that, even if it is not a blazing romance, it is beautiful to see how Yi Hwan (the Crown Prince) falls for Min Jae Yi, and vice versa, while holding back because of all the constrains that keep them from acting up upon their romantic feelings. Nevertheless, they are both intelligent strong minded characters with a great sense of justice and righteousness that prevails throughout the entire drama. It is great to see them together as they navigate through everything that the antagonists throw at them. Although this drama centers on these two main characters, the plot is more about a group of people that truly care, trust, and support each other as they fight to uncover the truth and bring down the evildoers. The cast did a phenomenal job bringing their characters to life and the drama has a great deal of substantial characters beside the leading couple. One to mentions is Han Sung On (Sergeant, Jaeyi's fiancé, Yi Hwan's close friend) amazingly portrayed by Yoon Jong Seok. Enjoy it!