Edwin, the deposed king of Northumbria, seeks refuge at the court of King Raedwald of East Anglia. But Raedwald is urged to kill his guest by Aethelfrith, Edwin's usurper. As Edwin walks by the shore, alone and at bay, he is confronted by a mysterious figure - the missionary Paulinus - who prophesies that he will become High King of Britain. It is a turning point. Through battles and astute political alliances Edwin rises to great power, in the process marrying the Kentish princess Aethelburh. As part of the marriage contract the princess is allowed to retain her Christian faith. But, in these times, to be a king is not a recipe for a long life .