Rome, 476 AD. The Roman Empire, a mighty force for almost 500 years, is being threatened. On the eve of twelve-year-old Romulus Augustus’ crowning ceremony to become the new emperor, Barbarian general Odoacer arrives in Rome to make a deal with Orestes. Odoacer makes demands of the Roman Empire in fair exchange for his decade-long support of the Roman legions in the east. But Orestes refuses. On Coronation day, as all of Rome gathers to watch the proceedings, Ambrosinus, the shaman who is a mentor and tutor to Romulus, predicts danger. Orestes is worried about his son’s safety and appoints Aurelius of the fourth legion to be his personal guard. That night, Aurelius and his legionnaires confront danger–Odoacer and his army have returned to Rome.

With a deafening roar, the Barbarian army storms the city. With Orestes slaughtered, Romulus is captured along with Ambrosinus and taken to the island fortress of Capri. But, not all the Roman legionnaires are dead. Aurelius is alive and when he learns that the Byzantine Empire will give Romulus sanctuary, he embarks on a journey to the coast accompanied by a small group of his men and a mysterious, black-clad Byzantine warrior.

Later, Aurelius discovers what lies behind the black clothing–a beautiful, young woman named Mira. Thanks to the strategic cunning of Ambrosinus and the fighting skill of Aurelius and Mira, Romulus is freed. But, when the group arrives on shore, they learn that the Byzantines have joined forces with Odoacer’s army of Goths. Faced with such betrayal, they must find the one legion still loyal to Rome–the ninth legion in Britannia. As they set off in search of the last legion, Romulus and Aurelius together embark on a new beginning.