"The Great King, Sejong" is a full-scale political drama describing how King Sejong and his loyal retainers cooperate and contrive to make his dynasty a better place. While King Sejong was on the throne, the Joseon Dynasty enjoyed increasing prosperity. The drama shows the dramatic processes of how so many new cultural heritages have been devised. At that time, "Hangul", the native phonemic alphabet system for Korean language was first invented and introduced. Before it was made, Chinese characters had been used for a written communication, which makes it extremely difficult for ordinary people to learn and use. "Hangul" is easy to learn for its simple and scientific principles. Other than "Hangul" itself, there had been so many cultural heritages during his regime including a rain gauge, a sundial, an hourglass to name a few. Also, King Sejong’s pragmatic diplomacy is concentrated in the drama. Then, the Joseon Dynasty was facing a powerful Ming dynasty of China, and King Sejong demonstrates the essence of pragmatism with dignity.
How to fill 86 episodes story? Shove a ridiculous amount of side stories while giving little to no attention to the story of the king! The king often felt like a side characters until he gets his moments every once in a while. These side stories were abysmal to follow through, they don't really contribute much to the drama and the characters involved in them usually disappear after that. Also, somehow they all had the same ending/conclusion, what even is the point?! This is the worst tale of a king I've seen, even when the king gets his moments it doesn't do a good job showing what made him a great king. Being soft and goodhearted isn't enough to convince us. It's mentioned in the synopsis that he invented Hangul, although that was the only interesting subplot but it didn't happen until the last few episodes. In contrast, the beginning of the drama with the king's childhood was the weakest and the worst part of the drama. The drama is extremely rough for what it had to offer.
What's up with killing off all the women?!