Historical novel. Northern England, in the year 866: at the age of ten, the prince's son Uhtred experiences the invasion of the Vikings. His impetuous courage in battle impresses the leader of the Danes so much that he spares Uhtred and takes him in as a foster child. Over the years, the boy almost becomes one of them. After raids and conquests full of blood and violence, Wessex, the last of the five Anglo-Saxon kingdoms, also threatens to fall to the conquerors. But then Uhtred changes sides again...