The miners are battling Greenland from two fronts with half the team finding huge rubies at the Red Zone and the other half dredging for gems in the river below. The Red Zone crew carves ruby-rich rock from its virgin claim and one of the largest deposits in the world, but Americo has an underperforming drill that might be a complete waste. Down at base camp, fuel for the dredge is dwindling, leaving Chad one last chance to find rubies in the river and show that his budget-draining behemoth was worth the cost and effort. Later, the Red Zone team has an encounter with a mischievous arctic fox and quickly learns that even small predators can cause a lot of damage, while the base camp team sees an approaching boat as a threat to its very existence. Can the miners persevere through competition and diminished resources before their entire operation is sunk?