Roman Empire, 30 AD. Titus Vespasian from the Flavian family, who served for four years in garrisons on the outskirts of the empire, finds himself drawn into a tangle of political intrigues in the capital. To fulfill the secret task of the grandmother of young Guy Caligula, Vespasian and his brother Sabinus have to go through many adventures. They fight the Getae on the snowy passes of Thrace, visit the sanctuary of the oracle, and engage in battle with pirates off the coast of Greece. However, the main dangers await the brothers in the Eternal City of Rome, where everything can be bought and sold, and human life is the cheapest.