AD 18, Britannia. Prince Caratacus arrives at the Druid sanctuary in the far west of the island of Britannia: the mountainous valleys of the Silurians. The prince endures initiation rites and proves his mettle in training - but what he does not expect to find is an enemy: a thuggish fellow student, Eboricus.
As the young soldiers-in-training are schooled in the art of war, it soon becomes clear Caratacus is far from the only student being tormented by Eboricus. Caratacus knows he must find a way to confront the bully - but a contest of strength is still far beyond him. And even his closest allies in this shadowy sanctuary may not be what they seem. . .