Casey races a top gun coachman into Midvale where they are greeted by a US army officer who takes command of the train and coach. The army is transporting a prisoner (Geronimo) to Deadwood and explains to Casey they expect trouble from Indians on the way. At Willow Springs the train is delayed after Indians have killed all the station staff. Finally arriving at Deadwood, Casey volunteers to ride with the stage coach to Gailleville to complete the prisoner transfer. Apache war-bands have other ideas and press home repeated attacks.