Sheriff Alec Lawson is riding on the Northern Colorado Railroad train when silver bullion, worth thousands of dollars, is stolen. He and his deputies search the mountains and mining camps for the thieves. Lawson is convinced it's no simple theft. Greed lies at the root of it all: bribes, bounties, social status and death. The Sheriff and his men risk all for other people's money, and death seems close when you ride on the roof of a runaway train!