Marty returns to his trap line to find it destroyed by wildfire; Mike hunts an elusive herd of Kodiak elk; Lauro and Neil Eklund journey down the Yukon River by log raft on a quest for beaver and fish.
Marty instructs his teenage daughter Noah as she pilots the bush plane; Mike hunts a herd of Kodiak bison and donates the meat to friends in town; Lauro and Neil check their traps and fishing nets on the Yukon River.
In the interior, Marty Meierotto puts the stalk on a group of caribou, but the hunt takes a wild turn when a family of grizzly bears comes charging toward his camp.
Marty embarks on a moose hunt, luring a bull within his sights. Meanwhile, Mike's relentless pursuit of foxes yields a collection of prize pelts. As Bret sets his sights on trapping wolves, Ivy balances duties at the homestead.
Marty has a near death experience when he plummets through ice on a frozen waterway; meanwhile, Lauro journeys deep into the untouched backcountry by dog team to establish an expedition camp.
Buried under record snowfall, Marty fights to heat his cabin and maintain his trapline; Lauro and Neil brave the icy Yukon River with their sled dogs, while Mike ingeniously crafts a driftwood windmill to power his homestead.
Marty digs his bush plane out from a deep snow drift to preserve his one lifeline in the bush; Bret and Ivy escape an avalanche from their cabin roof before embarking on their journey back to home base.
Marty escapes a blizzard and flies home from the trapline to reunite with his family; Lauro runs a 100-mile dog race and gets closer to qualifying for the Iditarod; Daniel takes down a black bear to provide meat for his family.
