Lost Love in Time and Space: Traveling to Ancient Times

A modern surgical master accidentally transformed his soul into a lowly undercover fake eunuch in ancient times. How will he cover up his identity while completing his mission in the crisis-ridden harem, and what kind of sparks will he create with the emperor who is disguised as a man? Can he use modern medical skills to make a comeback in this ancient harem full of conspiracies, and finally win the beauty back and gain power over the world?