In 1876 Wyoming the gun is the only law. And for Duncan and Susanna McKaskel, newly arrived settlers beset by outlaws, rugged frontiersman Con Vallian (Sam Elliott) is the only hope.

With no market for his herd, the master of a vast cattle ranch and his son decide to head the first cattle drive over the now famous Chisholm Trail, past the Red River, into Missouri. The path is filled with hardship and the drive looks hopeless as the men struggle to prevail.

A road comedy about 2 guys whose mission is to overtake the famed expeditioners Lewis and Clark and be the more fiery trailblazers of the Western North America frontier.