Possible spoilers:  Are Ba Wu, his father and grandfather historical figures in Joseon history?  I looked up  King Gwang-hae in Wikepedia. ", Gwang-hae tried to bring officials from various political and regional background to his court, but his plan was interrupted by Greater Northerners including Lee Icheom and Chung In-hong. Then, Greater Northerners began to take members of other political factions out of the government, especially Lesser Northerners. In 1613, the Greater Northerners moved against Prince Yeong-chang; his grandfather Kim Jenam was found guilty of treason and executed, while Yeong-chang was sent into exile, where he too was executed. "    Lee Icheom is in the drama as the king's prime enemy. . Ba Wu's father has the same name Kim Jenam who was executed.  So does that mean Cha Dol (or Ba Wu)is Prince Yeong-chang?   Do we know yet who Cha Dol's real mother is?