Parson Allen Hartman leaves behind everything he holds dear to embark on a cross-country expedition to minister to the Indians in the Oregon Territory. But his journey is waylaid in Arapaho country, and Allen is asked to stay in the village of Two Rivers --who has been waiting for the White Falcon to show up and aid his people's battle against a malevolent shaman. And even as Two Rivers teams up with White Falcon, Allen is enslaved in a cave and dependent on the prayers of Spirit-led believers for complete victory --or will something be left undone?