For centuries, the Riki and Aska clans have battled over a perceived feud between the gods they respectively worship. Seventeen-year-old Eelyn looks to avenge the death of Iri, her brother; but during the battle, as she is attacked by a Riki warrior, Iri steps in to save her, proving that not only is he alive, but he has joined the enemy. Eelyn then chooses to be taken prisoner to learn why Iri abandoned them, and discovers the two clans are more alike than she'd ever thought. When the Riki are attacked by a ruthless clan thought to be extinct, Eelyn is forced to trust the Riki warrior Fiske, her brother's friend, and his people who she has spent her life hating, as they race to unite the two clans to fight together or both will be lost.