On the advice of Ahès, Merlin embarked on a vast campaign against the defenders of Christ. Maelwys, king of Lindinis, was the first to see his lands submerged by the armies of orcas and trolls. In Londinium, the Breton kings held a council of war where two sides were opposed: that of Vortigem and that of the priest Patrick, who had only one wish, to put an end to this so-called messiah. Blaise and Maelle, for their part, were in search of the Grail. Destination, Avalon, a land of legend where the ladies of the lake lived.