AD 81, Scotland. The prospect of a peaceful and free future for Alba is threatened as Agricola, the governor of Roman Britain, plans an invasion of the north.
Rhiann is an Alban priestess and princess who submitted to a political marriage to Eremon, an exiled Irish prince. Out of duty, grew love - a powerful and desperate love that will bind them together through conflict and betrayal. Now in them lies the hope of a nation. For there is a new Emperor in Rome, Domitian, and he has commanded that Agricola crush the troublesome realm. Agricola's army is formidable - brilliantly armed and heavily supported. To the people of Alba it is a wall of steel and fire advancing across their homeland, bringing with it desolation.
The predestined day draws near: the armies of Alba and Rome will meet in an epic battle to decide the fate of a country. Rhiann searches for guidance in the spirit world, little realizing how big a part she will play in this endgame.
Eremon knows only that he must risk - and sacrifice - many lives, perhaps even his own.