Ashael is a hunter-gatherer woman, apprenticed to Bhearra, the healer and spiritual leader of their tribe. The Zanthar are invaders from another world who extend their own lives by stealing the life-force of everything around them. They were last seen on KalaDene 200 years ago. They have returned, looking for The Vessel, a being prophesied to hold the life-force of the land. Iwan is a slave to the Zanthar, descendant of the folk that were taken as slaves the last time the Zanthar visited this world. He is sent out as a spy, while his mother is held hostage to ensure his compliance. When Iwan and Ashael meet and she invites him to stay in Oak Cam, neither of them realise that she is the one the Zanthar seek. The fate of KalaDene and all of its people rests on Ashael's shoulders.