Sinopse
The novel is set in the 10th century. The Caliph of Baghdad sends his ambassador, Ahmad ibn Fadlan , to the king of the Volga Bulgars. He never arrives but is instead captured by a group of Vikings. This group is sent on a hero's quest to the north. Ahmad ibn Fadlan is taken along, as the thirteenth member of their group, to bring good luck. There they battle with the 'mist-monsters', or 'wendol', a relict group of Neanderthals who go to battle wearing bear skins like the berserkers found in the original Beowulf story.