The novel opens with Correus returning from a spying expedition to some of the local British tribes, one of which, the Silures, will provide the main antagonist in the person of their king Bendigeid.
He is subsequently involved in a battle against the tribe that killed his Freita and must also find time to rescue his half-brother Flavius Appius Julianus, his father's heir with whom he has an uneasy and somewhat adversarial relationship, from the Silures' allies.
And Correus also must come to grips with his increasing interest in the governor's hostage - a young British princess named Ygerna who has been given into his care to Romanize.
[2] In her own name, Ms. Cockrell also has written a separate non-fiction book called Legions of the Mist about the Legio IX Hispana which was stationed in the modern-day city of York during this period and whose actions play a large, albeit off-stage role, in the events covered in Barbarian Princess.
It is unknown why the series never continued past the third book as it was clearly intended to be a much lengthier tale, though the most probable reasons are a lack of consumer interest or a change of direction from either the publisher or the author.