Vikings pillage Ireland, seeking silver and slaves, slaying men and women in the process. A young boy is spared when a Viking takes pity on him instead of killing him. Twenty years later the boy returns to Iceland take his revenge.

Norway in the 10th century. Askur, son of the powerful Thorgeir marries Embla, daughter of one of the few remaining landowners in Norway, in a pagan ceremony. King Olav, a ruthless christian, wants to eredicate all traces of non-christian beliefs and captures the two of them during the ceremony. In order to free Embla, Askur must go to Iceland and convert the people there to catholicism.