The Mountains of North America haunt the imagination, masking a danger few are willing to confront. Despite the challenges, some choose to live this way, the last of their kind. Eustace Conway lives deep in the mountains of North Carolina. He moved here 33 years ago in search of a more "truthful" existence. In the years since, he's built a home, and survived by hunting, fishing and raising animals. Tom Oar lives with his wife on the Yaak River in Montana. He is 100 miles from the nearest town, a place he hasn't ventured to in 10 years. Marty Meierotto, his wife Dominique and their daughter Noah live in the small Alaskan town of Two Rivers. Every month, Marty pilots his bi-plane, traveling into the bush in search of the wolverine and lynx pelts he needs to make a living. While he's on the Black River, he must hunt moose and caribou to survive in the wilderness. Together, these men represent America's true Mountain Men.

Tom tries to save a friend's water supply and hunt his winter's meat; Eustace deals with the threat of someone trying to take his land; Marty Meierotto combats life-or-death situations due to breakdowns.

Eustace's fight with Justin reaches a boiling point; Tom loses his way high in the Rockies; Marty fights the elements as he tries to get home.

Tom makes a decision that will determine the rest of his life; Marty battles the weather in order to make it home for his family; Eustace continues protecting Turtle Island despite being sick.

Tom puts his work on hold while he tries to find winter meat and protect himself from looming predators; Eustace brings in a former Turtle Island worker to pick up the slack; Marty races to make his fur deadline.

Tom takes matters into his own hands and pushes dangerous wolves away from his property; the water runs out for Eustace; a simple mistake could cost Marty everything.