When the settlers from the Muddy River Mission, including the Davis Family, move to Long Valley in Utah, they establish the town of Orderville, the most successful and longest-lasting attempt at living the United Order. River is the story of these idealistic settlers who devoted themselves to living this order with "no rich or poor among them." As they strive to live this order, however, Morgan, Angeline, Ruth, and the other settlers struggle to balance individual freedom with community cooperation.
On top of this challenge and the struggles of settling a new town, Morgan and his wives must face the increasing demands of living the principle of plural marriage as their family expands and anti-polygamy pressure from the U.S. Government becomes intense. How will the Davis family face these new pressures and challenges? They're about to find out.