It is time for Arthur to come out of the shadow of Merlin in order to become the sovereign that Brittany has been waiting for so many years... But as he tries to unify the country and its many clans, Ahès, who left in Morgan's womb a poisoned gift, weaves again his canvas in the North. In Letavia, Bedwir joins Lancelot at war with Claudas, the murderer of his parents...