Devil Mask, a sorcerer and leader of the Hurons with his face hidden behind a demonic mask, wants to ignite a war against the whites. To achieve this, he traffics arms and whiskey with a group of renegades. Zagor travels to the Huron tribe, confronts Devil Mask, and defeats him. Humiliated, Devil Mask throws himself into a river’s whirlpools, vowing to return from the dead to haunt the Spirit with the Hatchet.
The Hurons are now pacified, and their new leader is the young Kamar. But who was supplying the rebels with weapons? Following the trail, Zagor comes to suspect Arthur Manning, the wealthy owner of a weapons factory in Zaneville. He goes to the factory but is captured along with Chico. Both are saved by the soldiers, the factory explodes, and Manning’s paralyzed son, James, dies in the fire.
The matter seems settled until some time later, Kamar contacts the King of Darkwood and informs him that a man appeared out of nowhere in his hut and took up the mask of the former Huron chief!
Devil Mask returns, leading the Hurons in an assault on the swamp hut. Zagor and Chico emerge victorious from the confrontation and discover that the new Devil Mask is actually James Manning, who survived the fire and had been pretending to be paralyzed for years.
Before dying, he reveals that he is the son of Devil Mask’s sister and of Manning, who had rejected the Indian woman out of shame. The boy developed a deep hatred toward both whites and Native Americans (who had killed his mother), and had worked in secret with his uncle to provoke war. With his death, Devil Mask is finally gone for good.
