Last Stand at Bitter Creek

For one battle-weary Union spy the Civil War is not over. The bodies of an Army patrol carrying out a secret mission for the president lay in the blood-soaked soil of a remote ravine, victims of an ambush by soldiers of the same Army under the command of a rogue military leader. Union spy Grant Bonner's post-war undercover mission is compromised, exposing him to the danger of a cunning adversary who targets him for death.
Forced on a run for his life, his journey takes him to a small frontier town where he uncovers an elaborate conspiracy involving a stolen shipment of gold and the heist of a priceless historical document. In order to stop it, Bonner enlists help from an improbable source and risks everything in a lethal confrontation between the hunter and the hunted.