In 43 CE, when the centurion Macron receives an assignment to the lands of the British tribes, he has no idea that in this place, a battle-hardened warrior, he is about to face one of the most difficult campaigns. Macron and his young subordinate Cato must find and defeat the enemy before the latter grows strong enough to crush the Roman legions.
But the British are not the only adversary confronting Macron and Cato: in the shadows of bloody clashes, a conspiracy against the very Emperor is taking shape.