Arriving back in the Rockies, the mountain man discovers that even the famous Jim Bridger has abandoned trapping and settled down to trade with overland immigrants plying the Oregon Trail. Wondering where his own trail will lead him, Bass journeys south for a reunion with an old friend in Taos-only to be caught up in the "Taos Rebellion." And in its tragic aftermath, Titus finds himself once again an outsider in a world he no longer recognizes.