In a remote outpost, Sara and her son Devin begin to build tentative bonds as they seek a guide to lead them through perilous paths toward the western frontier.

A chilling encounter catches Sara's group off guard. Meanwhile, Jacob, carrying deep wounds, assembles a band to locate Abish. Elsewhere, Isaac confronts echoes of his history.

A whisper of a clue draws Jacob into the pursuit of a bounty hunter. Meanwhile, Brigham Young arrives at Fort Bridger. Elsewhere, Sara, Devin, and Isaac confront a darkness that lurks within the world.

Red Feather resolved to fight. Jacob, spurred by his suspicions, took action, while Abish received news that struck her with a shock. As they journeyed toward Crooks Springs, the weather grew increasingly severe.

With Devin’s injury deteriorating, Sara confronts a harrowing decision. Brigham Young extends a proposition to Bridger. Abish delivers a grim warning to the Shoshone people.

Disregarding the peril, Isaac resolved to rescue Sara. Jacob’s quest for Abish concluded. Bridger offered a celebratory farewell before departing.