The Novel is about a Vikingar named Magnus who leads a journey to North America, or what the Viking's called Vinland.  Once there, he interacts with various Native-American tribes, befriending some while fighting others.  He teaches his Native-American friends how to smelt iron, enabling them to work with metal.  Back in Scandinavia, Magnus's 1st wife serves as a shieldmaiden, defending their village from other Viking raids.