A fisherman's son, Alun ap Drystan worships his grandfather Iolyn, a renowned former warrior. The old man is worried about the future of his homeland, and to help, he sends father and son to visit a reclusive seer with Druidic blood. Speaking in riddles, the seer tells Alun the find the Battle Prince: together, they will be the saviours of Gwynedd, and that he will be a great warrior, mingling with the greatest in the land. After a...