Vikings attack the village where Eyra, the jarlsdóttir, trains alongside the young shieldmaidens, while her mother demands that she master the ancient arts of the Völur-a mystical bloodline that has empowered the women of her family for generations.
Amid fire, slaughter, and the collapse of everything she has ever known, Heidrek, heir to the feared berserker warriors and Eyra's beloved, becomes her strongest ally in a desperate fight for survival.
But when a terrible curse unleashed by the Völur transforms friend and foe alike into obedient beasts, the battle changes forever. What begins as a struggle to save their people becomes a far more dangerous challenge: discovering whether love can survive the brutal price of power, and whether some victories are worth the cost they demand.