In A.D. 922 Ibn Fadlan, the representative of the ruler of Bagdad, City of Peace, crosses the Caspian sea and journeys up the valley of the Volga on a mission to the King of Saqaliba.

Before he arrives, he meets with Buliwyf, a powerful Viking chieftain who is summoned by his besieged relatives to the North. Buliwyf must return to Scandanavia and save his countrymen and families from the monsters of the mist...