Slowly, the ancient tradition linked to the Celtic Gods is extinguished. The people forget it for the benefit of the One God. But it is not to mention the goddess Ahès! Brendan's life is now in his hands. Maelle could still save him by agreeing to convert, but she refuses and joins Avalon. Ahès, Merlin, Blaise and Solenn are now at the head of an immense army, ready to roll over to Avalon. The war can now begin! But everything becomes fragile: Ahes doubt of Blaise, and since he has purposed the water of Bran's cauldron blessed him, Merlin seems to be possessed. At the dawn of a great battle, it may be that these uncertain times finally join the legend so often prophesied.