In this mini-series, a soldier called "Petronius" unsuccessfully tries to murder Caesar Valentinian. The name "Petronius" was probably chosen because in reality, Valentinian was eventually killed by a Senator named Petronius.
Prologue for both part one and two: "Though decadent and corrupt, weakened by politics and war, the Roman Empire remained the greatest power on earth. Then a new people, the Huns, fierce and independent, appeared from the east. An ancient prophecy told of a man who would one day unite the tribes and challenge Rome for the right to rule the world..."