Well I had seen commentary about this one several weeks ago and got to see it last night. It was actually so good that the action alone could carry most of the story since I did not understand the dialog. Now although the name translates directly as 'The King's Man' the English title being used for it is the "King and the Clown". This is why I had such a hard time finding it on this site, so the administrators might want to add this other title. It is based on a true story. Also the historical representation (should be somewhere around the year 1506 since this is the end of King Yeonsan of the Joseon Dynasty's reign) or staging and costumes was absolutely magnificent, not to mention some very good acting.
Review of The King and the Clown
