The adventures of Ragnar Lothbrok, the greatest hero of his age. The series tells the sagas of Ragnar's band of Viking brothers and his family, as he rises to become King of the Viking tribes. As well as being a fearless warrior, Ragnar embodies the Norse traditions of devotion to the gods. Legend has it that he was a direct descendant of Odin, the god of war and warriors.

The history of the Vikings is explored by "Vikings" star Clive Standen, who joins experts in Europe to learn how the Vikings successfully invaded England and France.

Viking culture is seen from a first-hand experience through Athelstan's perspective. Athelstan reflects his inner thoughts on the ways of the Northmen including all their customs, values, and morals. Watch the young priest struggle with an emotional and psychological turmoil as he balances his faith in both God and Odin, revels in bloodshed then is haunted by memories of combat, and then recognizes the personalities of his barbarian family and understands that they, though pagan, are human beings.

A young Viking must come to terms with the realization that he may be the King's son, who was switched at birth, but not before others try to take his rightful place.