More than a thousand years ago, the Viking warriors Steiner (Charlie Bewley), Grimmie (Michael Jibson), Hagen (Clive Standen) and other warriors fought fiercely and dangerously with the invading Saxons. Not long after, the Viking King (James Cosmo) was terminally ill. He had no intention of passing the throne to his son Steiner, who did not believe in gods and prophecies and only worshipped his own strength. At the same time, he did not make plans for his other ambitious son Harold (Finlay Robertson). The old king instructed Steiner to find his eldest son Haken (Elliot Cowan), who had been exiled for a long time, and welcome him as the new king. Steiner accepted his father's order and embarked on a dangerous journey to find his brother with Hagen, Grimmie and his half-brother Wally (Theo Barklem-Biggs). At the same time, Harold secretly colluded with the Saxons, and the fate of the Vikings was tied on a thread.