With mobs threatening to drive them from their homes, thousands of Latter-day Saints flee Nauvoo, their gathering place for the past seven years. Following Brigham Young and the Quorum of the Twelve Apostles, they travel west across prairie and plain, trusting in God to prepare a home for them beyond the towering peaks of the Rocky Mountains.

Finding a new home is only the beginning of their story. In their quest to serve God and build Zion, the exiled Saints struggle against new obstacles and greater persecutions. Stalwart women and men work together to forge communities where the faithful can gather near temples established for the glory of God and the redemption of the living and the dead. At the same time, hundreds of missionaries journey to distant lands to invite others to come to Christ and help establish Zion.