This epic is spread over 16 x 90 minute episodes.
From Wiki - "In 1388, Yi Seong-gye was sent to invade the Ming dynasty at Liaodong, but he turned his forces around and defeated Choe Yeong in a coup d'état; in 1392, he replaced Goryeo with the new state of Joseon, bringing an end to 474 years of Goryeo rule on the Korean Peninsula."
In reality, the King had eight sons and they jockeyed to see who would be The Crown Prince and the next King. But first, you have to try and stay alive long enough. Regicide, Patricide, Fratricide - was all par for the course. The same story as multiple Japanese and Chinese Royal-Family costume dramas, with a Korean twist.
A great cast of characters. There is sword fighting galore (pretty realistic to me),
and I recognized snippets of scenes from movies as diverse as Rob Roy and Hero. You'll see.
Without giving the game away, there is: scheming, framing, love, bromance, betrayal, battles, loyalty and a surprise ending. All in all - well worth your time.