Jones arrives at Finney's offices to be briefed by Peter Holmes a US treasury official. Jones is due to run a military prison train to Kansas and is instructed to take a load of gold bullion with him. Part way along the trip the train is stopped by damaged tracks. They decide to back the train up only to discover the line behind them is also damaged. A gun battle erupts when a group of outlaws ride in but a driven off by the guards. Casey devises a plan to rebuild the rails. The plan requires releasing the prisoners, who see their chance and make a break for it till ...