AD 180. Vindolanda, Britannia. Sarmatian warrior Kai and his adopted tribe, the Votadini, struggle for survival in unfamiliar lands north of the Wall, living just beyond the reach of Rome.

When an old enemy takes control of the Votadini's hated foes, a confederation of tribes known as the Painted People, and rouses them to action, Kai heads south, hoping to ally with the Romans against this resurgent threat.

But the Romans have heard tales of butchery and mayhem beyond the Wall. Lucius, Legate of the North, believes Kai and his allies are responsible, and sends forth an expedition to capture his old comrade.

Can Kai survive the onslaught - or will such determined enemies spell the end for the warrior and his tribe?