As melting permafrost makes mud out of pay dirt, Andy devises an engineering longshot to prove the Lost Cut is rich with gold. As Todd and his crew dial in the wash plants, anticipation grows for what could be the Hoffmans' biggest gold weigh of all time.

The Hoffmans are succeeding on an Alaskan mine site that ruined generations of miners before them. But when muddy meltwater infiltrates their wash plants, Andy must re-engineer their entire water circulation system to keep their gold from floating away.