Rome, A.D. 55: Emperor Claudius is dead, and the cruel Nero now reigns on the throne. When Prefect Cato and Centurion Macro return from a campaign, they find Rome in chaos. For Nero's rival, Britannicus, is also hungry for the throne. Desperately, Cato and Macro try to assemble an army of brave, loyal fighters. But in the power struggle that now erupts, Rome is threatened with civil war. For the two blood brothers, a battle begins in which not only their lives but the future of the Roman Empire is at stake...