Sean MacMasters survived the brutal battles of the Civil War as a Confederate Cavalry officer, returning home to Texas with little more than a bushy moustache and a knack for horse sense. But in the volatile post-war spring of 1868, peace is short-lived. When a trio of ruthless carpetbaggers shoots his father in an attempt to steal the family ranch, Sean is forced to take swift, lethal action.
With blood spilled and trouble brewing, Sean's parents urge him to ride north. Taking charge as trail foreman, Sean sets out to drive a herd of over two thousand head of wild Longhorns 600 miles to the new railhead at Abilene, Kansas.
Joining forces with a grizzled army veteran, a deadly teenage gunslinger named John, a violin-playing drover, and a dedicated crew of cowboys, Sean must navigate the treacherous Chisholm Trail. Between lethal river crossings, hidden quicksand, rogue rustlers out for blood, and constant threats of stampedes, Sean has to bring the herd through alive-or lose everything his family fought to build.