Woken in the middle of the night to flee the fortress of Bebbanburg on the Northumbrian coast, the twelve year old Prince Oswald escapes his father’s killer, Edwin, to establish a new life for himself on the West Coast of Scotland. He becomes a staunch Christian on Iona and trains to be a warrior, making a name for himself in the frequent wars in Ulster and in a divided Scotland. Having earned himself the nickname of ‘Whiteblade’, he establishes himself as the greatest war leader in his adopted homeland. However, he is beset by enemies on all sides and is betrayed by those he should be able to trust the most.
After playing a leading role in deposing the treacherous Connad, King of Dalriada, he helps his successor to extend Dalriada to include the Isles of Skye, Arran and Bute. When King Edwin is killed in battle and those who try to succeed him are also killed by Cadwallon and his invading Welsh army, Oswald decided that his moment of destiny has arrived; he sets out with his warriors to confront Cadwallon and win back the throne of Northumbria.