While their father Fenton Hardy is in Montana working on a case of missing gold the Hardy Boys go skating on Shallow Lake with their friends Chet Morton and Jerry Gilroy where they meet Jadbury Wilson, a poor old man who is also a former gold miner from Montana. Wilson tells them his tale of how Bart Dawson, a trusted member of his party, ran off during a gun fight taking four bags of their gold with him for safekeeping but failed to return once the gunfight ended. Upon returning to the Hardy home, with the injured Jadbury Wilson, the Hardy boys receive a telegram from their father requesting that they join him in Montana immediately.