Following the defeat of the Spartacus rebellion, Julius Caesar and Marcus Brutus, who have been sent to run the Roman colonies in Spain, return to challenge powerful senators to become one of the Consuls of Rome. Political opposition, family quarrels, armed rebellions and corruption make this a highly contemporary scene, fuelled by the intrigue of the major characters, who are now developing as full adults.
As he takes the legions north into mighty battles with the Gallic tribes, the imperious stand of Caesar and the leadership of his men, his new friendships with fellow leaders, and his overwhelming ambition begin to separate him from Brutus, the great swordsman and warrior. Their long friendship reveals ominous cracks under the strain. Although the Gallic conquests lead to Caesar's triumphal entry into Britain, the victories on the battlefield cause political rivalries at home, and ultimately the famous choice is presented to Caesar and Marcus Brutus. They must decide whether to cross the Rubicon – together or singly – and to take the fight to Rome itself.