The drama started off promisingly. The FL was on a revenge mission and she had to dress as a man to become a royal doctor and hence enter the household of THE army commander. So far so good, the first few episodes was played like a farce and there were funny moments. The meet-cute between the F/ML was good but I don't really like the power dynamics between the OTP for a good portion of the show. There was so much master/slave role play and grovelling. I was just about to type "then the show began to drag" but I had to stop myself because technically, it didn't drag, well, not yet. It just played with the same ideas over and over with some embellishments. There was progress on the side but the main theme went on for too long without resolution. All this time, the smartest dude in the city, aka the ML, just kept missing all the signs that the FL is actually a she. He got really confused about his feelings for her and pull the noble idiot trick by sending her away as he can't have romantic feelings for a man, heaven forbid!
This actually reminded me of Coffee Prince which had the ML all tied in knots with his feels towards the FL (which was also cross-dressed as a man) but the k-drama was far superior to this but I digress.
Where were we . . . . ? While the first half of this show was muddling its way through some rom-com shenanigan, it all suddenly turned very dark when the commander played the noble idiot card. There were evil plots, tortures, murders, etc. Even when the ML rescued the FL from certain death, you would think "hooray, big reveal, happy times!!", the writer(s) actually doubled down on the gender bending plot and injected more angst and more misunderstandings. Honestly, the first half of the show was built upon one big lie but the second half was basically rounds of misunderstandings compounded by more lies and misguided good intentions. It was a frustrating watch to say the least. This type of tonal inconsistency was quite evident in the second half.
At about the 2/3 mark, the ML finally discovered the FL's gender (but not her true identity), he did a happy dance and swept her off her feet and did all the sweet things that should have taken 3-4 episodes to do but covered them in a few scenes. The good times only lasted a couple of episodes anyway and the show went full melodrama on us. It was not even good melo. Just more angst, more deceits and things kind of went full circle.
Why I said the show went full circle was that a lot of things hinted at the beginning came back to haunt us. When you consider there were literally a handful of key characters, the circle was quite small. Annoying characters that were banished returned. Love triangle that was resolved, revived. The sad part was that the 2ML would have won the Noble Second Lead Syndrome hands down had his personality changed so that he became despicable (he was redeemed at the end). The whole 2FL plot basically went nowhere. I mean nowhere.
A lot of the last third of the show served only to push a few emotional buttons and extended the story. The so called evil mastermind plot was weak and served only to tie a few threads together.
It was no surprised that we ended up with a cliché happy ending. It was nice but not very satisfying. The lady that was the root cause of all the misdeeds didn't really pay for her crimes. She just went and became a nun. A standard out in a historical context but not a very satisfactory from a modern viewer's perspective.