This is probably one of my favourite historical k-dramas

It tells the story of street performer who has an identical face as the king. The two swap places as the king is overloaded with responsibility and guilt, so the street performer was forced to wear the crown as the king is away. Lots of political intrigue that will keep you in your toe, action scenes are well choreographed, and there is romance with the king's wife, but it is not the focus of the story.

The acting was beyond amazing, the story well told and as a person that gets easily bored with some dramas, it was easily to watch and follow.