Britannia, 60 AD. When her husband dies, Boudicca, Queen of the Iceni, expects Rome to enter into a new agreement with her people. However, when Rome betrays them and her daughters are raped by Roman soldiers, Boudicca swears revenge.
The Britannic tribes rise up and join her in a campaign against their oppressors and soon her enormous army sweeps across the country in an unstoppable campaign of brutality.
A young boy races to join her cause, but when it is discovered that he is the last true blood of the Deceangli, Prydain, the ex-legionary, embarks on a mission to save him. For the final time, his path is destined to cross with Cassus, the boyhood friend who has sworn to kill him, whatever the cost.