In the midst of the chaos is Sergius Paullus, a young Roman whose spirit is as troubled as the Empire. From childhood Sergius dreams of the glory of being a soldier, but instead must be content with schooling and the games of children. Finally, his impetuous nature prods him to an act of rebellion that changes his life. Forced to leave home, he embarks of a trail of adventure that leads from the tenements of Rome to a series of military escapades in Hispania, Rome, and Gaul, and ultimately to a climactic battle in Britannia, where Sergius leads a doomed resistance to the barbarians.