Plot: The series focuses at the beginning of the 2nd Goryeo-Khitan War in 1009 and the end of the 3rd Goryeo-Khitan War in 1019; and the recognition of King Hyeonjong by the Liao king in 1022. The Khitan Empire, also known as the Liao dynasty, was a great power at the time, and Goryeo was an emerging state