Fred Hurt and his son, Dustin, aka the Dakota Boys, return to Alaska to continue the search for gold in the dangerous white-water rapids of McKinley Creek.

The Dakota Boys struggle to run their two dredges until Casey Morgan arrives, but they're soon a man down again when a crew member is savagely burned.

A hungry and aggressive apex predator tears through the miners' camp, forcing the crew members to come together to find a solution; the crew use new equipment to speed up their gold recovery.

Fred and Dustin disagree on where to find the gold and dig separate holes, however a fierce confrontation jeopardises the entire operation.

The Dakota Boys and the crew face difficulties and delays when their equipment breaks. However, their hard work finally pays off when they find a huge amount of gold.

After finding their biggest gold nugget of the season, soon enough heavy rain means flooding, and, despite the danger, the Dakota Boys still go out and dive.