This story follows Herannuen, whose small, quiet world in the early tenth-century Breton bocage is violently shattered in 937 C.E.. When a brutal raiding party of Norsemen reduces her isolated homestead to ash and murders her father before her eyes, she takes up his massive iron broadsword and crosses the threshold of blood. Fueled by a feral, uncompromising rage, Herannuen joins the broken remnants of the Breton heavy cavalry led by the battle-hardened Sir Renart and the exiled Duke Alan Barbetorte. Together, this desperate band of survivors wages a merciless shadow war against the occupying Norse Jarl of the Loire. From the freezing, high-altitude passes of the northern mountains to the suffocating, smoke-choked streets of Nantes, the story delivers a visceral, unflinching tale of survival, loss, and the heavy toll of medieval warfare.