Set in the fictional land of Aseudal during ancient times.
Eun Sum (Song Joong Ki) was born with a fate to bring disaster to Aseudal. Because of that, he goes through hardships and after grows up, he appears again in Aseudal.
Ta-Gon (Jang Dong Gun) is a war hero of Aseudal. He has paved the way for Aseudal to become a prosperous city nation and now he is the most powerful person in Aseudal. His dream is to become the first king of Aseudal.
Tan Ya (Kim Ji Won) was born with the same fate as Eun Sum. She is the successor of the Wahan Tribe. Going through hardships, she realized her mission. She lives under the highest honor and her ambition is to become a politician.