The year is 180 AD. The Roman Empire stands at the zenith of its power, a colossus of marble and iron stretching from the mists of Britannia to the sands of Syria. To the citizens of Rome, this is the Golden Age, the eternal Pax Romana. But the world is older than Rome, and it does not wish to be conquered. Beneath the cobblestones of the Appian Way, ancient things are waking. In the forests of Germania, the trees whisper in human tongues. And in the Senate, men trade their souls for power, opening doors to a void that hungers for the light of civilization. You are an Intercessor. You are a Centurion with a dented shield, a Senator with forbidden knowledge, or a Thief who has seen too much.