The western tribes, inspired by the Druids' hatred of the Romans, prepare to make a stand.

Wounded during a skirmish, Centurion Macro remains behind in charge of the fort as Prefect Cato leads an invasion deep into the hills.

Cato's mission: to cement Rome's triumph over the natives by crushing the Druid stronghold.

When Macro's patrols report that the natives in the vicinity of the garrison are thinning out, a terrible suspicion takes shape in the battle-scarred soldier's mind.

Has the acting Governor, Legate Quintatus, underestimated the enemy, his military judgement undermined by ambition?