In 775 AD, Thorbjörn is the last Thunder Warrior and Thunder priest of an ancient lineage reaching back to the Age of the Great Stone temples in Götaland has found refuge in the peaceful Baltic River Lands. He knows that he must teach his daughters how to survive and remain free in case of a Viking raid. Little could prepare either seventeen year old Zivah, or seven-year old Thordís for the onslaughts of the Viking Rus, pirates and slavers who were lawless, barbarian men forced into exile in the East. Men eager to profit from the civilizations endless demand for new slaves. Raided and made orphanes, little Thordís embarks on a quest to save her older half sister from rape and slavery while befriending some of the most strange and contrarymen to ever exist.