During the Joseon dynasty, the crown princess consort secretly gives birth to a girl and boy twins. While the boy will eventually inherit the throne, Confucianism values really condemn twins especially if it was a boy and a girl because they just don't think a man who shared a womb with a woman will have legitimacy. Therefore to protect the prince's future legitimacy, the King orders that the girl and everyone involved with the childbearing be put to death so no one knows about this situation. To protect the girl, her mother fakes her death and cast her way to live out her life in the countryside. Many years later, this girl the female twin ended up taking her brother's identity as the young prince because an incident killed the prince. The only people who now know her secret are her chief servant and her personal eunuch.

I have quite a lot of pros and the first is the portrayal of every character, especially our female lead. Her charisma and deep voice make it very believable, she is just like a very pretty boy in her prince costume. Although her figure is very slim and her small arm is very obvious she gives a lot of confidence with only just a cold stare. The only thing that I think could have made it better is if they did something to hide how short she is she really is because the height difference between her and her male lead co-stars is really noticeable.

Next, the pacing because overall I think it's very good, I'm completely absorbed by every episode up until probably episode 8. The child actors and actresses are doing a great job to make me emotionally invested right from the first episode. The child actress who played the twins, Choi Myung Bin, really shines in her roles! She pulled out the duality between the different twins' characters very naturally. Another pro is the OSTs are hauntingly beautiful, my favorite is "The One and Only", and "Shadow of You".

My con is mostly on the romance plot dominates the middle part of the story. I am not as engaged and I think that's because of the romance. Even though the romance is beautiful and I ship the couple, it is very heavy-handed and slow-paced. I'm watching the show because I really like our female lead and I want to see her navigate situations and crises, like her dealing with the envoy from China, fighting her grandfather's dictatorship, and keeping her secret. I think they are the strength of this series not so much the romance. Lastly, the action scenes are done incredibly well, but they're so sparse so I wish they are less melodramatic and had more action scenes.