Julius Caesar has taken his legions north into mighty battles with the Gallic tribes. But as his successes mount, overwhelming ambition and new alliances begin to threaten his friendship with Marcus Brutus, brother-in-arms and fellow warrior. Although the conquest of Gaul has made Caesar a hero all over again, his victories on the battlefield cause still more rivalries at home. And ultimately Caesar and Brutus will have to choose whether to cross the Rubicon - together or singly - and to take the fight to Rome itself.