When Roman legions march over the borders of the Empire they meet an enemy greater than any they have ever faced. Emperor Vespasian has ordered a push further into Germania than the legions have ever been and an enemy army is gathering to meet them. What neither side is prepared for is the darker force that they will both face. Indiscriminate and incapable of mercy, the new enemy will drive the Romans to the very brink of destruction.The Gates of Hades have opened and the Roman Legions must face what has escaped.