V century from the Nativity of Christ. Four hundred and fifty-first year. The Hun of Attila, the Scourge of God, the thunderstorm of the Romans, and Aetius, the brilliant commander, the last hope of the empire, must converge in a decisive battle. A battle that surpasses all the battles of past centuries in scale. But the outcome of the fight does not depend on them, but on the modest chronicler from Constantinople Jonas Alabanda, because it was in his hands that the sacred talisman of the Huns, the sword of Mars, turned out to be the will of fate.