After seven years of hard-won peace, a Viking army lands in Wessex and attacks Rochester. Alfred the Great has traitors within the Empire, and two powerful Viking Kings to his north. Nevertheless, he manages to drive out the invaders. He hits back at their sanctuary, and enrages Guthrum of East Anglia. The West Saxons cross the Thames River, decimate the Viking settlements on the northern shore, and seize London. Guthrum gathers his forces and marches south, while Alfred and his army prepare for the battle which will decide the fate of all Britain.