More then anything, because of historical facts. if you got interested in historical events from Scarlet Heart, you should give it a try ( like I did). This drama takes time just after Gwangjong's reign, and starts with story of Gwangjong's son, Gyungjong. There're some more couple of characters that you will recognize from Scarlet Heart.. As well, all the tragedies start because of the battle for the throne...