Before the coronation of Roman Emperor, the barbarian general Odoacer arrives for diplomatic talks with the father of the future Emperor Orestes. In exchange for his long-term support of the Rome the barbarian leader Odoacer put forward his claims for the Roman Empire. But Orestes refuses to sign the agreement on the barbarian conditions. Little Emperor Romulus who was put into a prison on the Capri island finds a unique weapon, an emperor`s sword which can bring victory to the one who is chosen to rule the Empire. Byzantines at first agreed to help the young emperor but then their position changed and his only hope has become the ninth Roman legion. Due to the wise advises of his teacher Ambrosinius and his loyal friends and brave warriors Mira and Aurelius, Romulus unites the Roman warriors and leads them in the great battle against the fearless enemy. This film contains a mosaic of elements of epic sagas and classic literature works, connected in the form of traditional historic action adventure.