A "one-man band" British Columbia miner needs Freddy and Juan to triple his gold to avoid ruin. But once the rescue begins, it quickly becomes too much work for a solo operation -- meaning that the miner's reluctant wife must learn to use heavy machinery.

A trio of young Idaho miners struggles to find enough gold; to save them, Freddy and Juan bring new ingenuity to keep their mine alive; Freddy must identify a heavy, mysterious material he's never seen before, hindering their clean-ups.