Scotland in 79 AD: Only the marriage between the Scottish princess Rhiann and the Irish warrior Eremon can unite the quarrelling Celtic tribes for the fight against the Romans. But Rhiann, brave, spirited and independent, is scarred by her past. Even though she agrees to marry the foreign Irish warrior out of a sense of duty, she refuses him. But Eremon succeeds in winning Rhiann's tribe over as his leader - and secretly capturing her heart. In the midst of chaos, war and devastation, it is almost too late for the lovers...