Doctor John Holliday pursued by the Texas Rangers and the U. S. Cavalry is forced to flee Texas. His destination is Denver, Colorado, 900 miles away through uncharted territory. Doc., never a horseman, is in for the ride of his life. Along the way, he deals with the rugged terrain, hostile Kiowas, Comanches, and Cavalry deserters intent on killing him.. Only his fast gun, aggressive nature, and ability to develop trustworthy friendships can save him.