Tarzan comes across a party of religious pilgrims who are being led by Rosanna McCloud to their "Promised Land". To not shatter their dreams, Mrs. McCloud does not inform her followers that her husband, whom they regard as their Prophet, has just been killed, and she is unaware that the government trader who sold the group the land from a reclusive tribe had his own motives for doing so and never intended for the group to reach it. When Rosanna finally tells her group about the death of their leader, she and Tarzan also find that their money has been stolen.

Rosanna McCloud and her pilgrims are determined to continue in their trek toward their Promised Land, even after one of their people is killed. Now they are armed and determined to fight off the tribe that lives in the land. Tarzan, meanwhile, learns that the chief of the tribe was tricked into selling the land by the trader Whitehead, whom he hopes to expose before more blood is shed.