A historical drama that deals with the second and third periods of the Goryeo-Khitan War. King Hyeonjong of Goryeo and his political teacher, Commander-in-Chief Gang Gam Chan, united the people of Goryeo and led a war against Khitan.
(Source: HanCinema, AsianWiki, NamuWiki; edited by MyDramaList)
~~ Adapted from the novel "Goryeo-Khitan War: Sweet Rain in The Winter" (고려거란전기: 겨울에 내리는 단비) by Gil Seung Soo (길승수).