The Great Seer begins during the reign of King Gongmin (Ryu Tae-joon). But despite being about seers, geomancers, divinators and the like, this drama is less about the fantasy and more about the political movers and shakers — people who had the power to advise, and therefore control, kings. Yi Seong-gye (Ji Jin-hee) is the general who led the overthrow of Goryeo and established the Joseon Dynasty, becoming its first king.