Drama series follows the life Jang Yeong-Sil: a scientist, technician and inventor during the Joseon period. Jang Yeong-Sil was born in the lower class nobi. King Sejong notices his abilities and brings him to the palace. King Sejong grants him a chance to display his abilities. He invents tools like astronomical instruments, iron printing press and a water clock.
A boring start, it certainly took some time to get going. Even then, it wasn't a smooth sailing after that. Whenever the drama managed to pick up a good momentum, they shove in a massive intervention with their palace politics. Disrupting the flow and the main attraction of the drama. Like pulling the sheets away on a cold winter night. Which is why this was its biggest problem, being wrapped around politics instead of giving it its independence. This was easier for the writers so they don't have to go into too much details and technicalities, instead auto generate some mindless palace drama to fill the gaps. I found the ending to be quite distasteful to this man's journey.