Movie Story : At the height of their power, the Targaryens rule over more than fifteen dragons, yet history shows that mighty empires rarely last. The decline begins when King Viserys defies a century of custom by naming his daughter Rhaenyra heir to the Iron Throne. After he later fathers a son, the court is stunned to see Rhaenyra keep her place as heir, and the resulting tensions begin to split the realm apart.