The weather is turning, and it's become 'make or break' time for many miners in the fleet. Vern finds a lucky nugget, while Shawn battles freezing ground -- but Joe loses his ace diver. Facing mutiny, Zeke pulls up his stakes to find a new claim.

In an epic finale, the fleet risks their operations for one last big payday as Nome Harbor freezes over. Shawn battles the inland ice, facing the facts; Chris goes for his biggest haul yet; and Vern overcomes the loss of his key diver for a big payday.