Me and my wife just finished watching Season 1 (6 Episodes) yesterday. Ganda! Panalo!
Kingdom (Korean TV Series)
Starring:Ju Ji-hoon, Ryu Seung-ryong, Bae Doona
Creators:Kim Seong-hun, Kim Eun-hee
From Netflix:
While strange rumors about their ill king grip a kingdom, the crown prince becomes their only hope against a mysterious plague overtaking the land.