'He is the prince that was promised, and his is the song of ice and fire.' Rhaegar believed that his son would be the savior, but Rhaegar was slain on the Trident and his supposed son was murdered by Gregor Clegane. But the real Aegon was not killed that day and his story has not found it's end. Alternate tale of Aegon VI and his role in the future of Westeros.