When a stage is robbed and the driver killed, all the evidence points to an old prospector named Burro Sam. Hardie thinks the evidence is too obvious and does his own investigation.; Hardie is helping guard a shipment of old currency that is being sent back to the mint to be destroyed. The train carrying the shipment is partially buried in an avalanche and then is attacked by robbers.; Hazards of stagecoach travel in the old West.