Scrambling to finish trapping season, Heimo discovers the best catch of the season; Charlie walks a legend's footsteps as he works the trap lines Bob left to him; and Tyler takes on the challenge of getting their hunting cabin ready for next season.
Heimo tests his trapping skills on both land and water to outsmart one of his favorite catches, beaver. Scott puts lessons learned to the test as he tracks marten. Tyler's plan to run his sled dog team is threatened when the pack turns on each other.
With temperatures plummeting, Heimo pushes into the Arctic, desperate to get a moose for winter; and Charlie and Tyler look to start their trapping seasons, but must overcome devastating fire damage on their traplines.
As moose season opens, the hunt is on to get meat to sustain them through winter. As Charlie looks for a kill, he realizes he's being stalked by a bear. Heimo takes Krin to his best moose territory. Tyler takes to the skies to assess the fire damage.
As winter closes in, Tyler is on a desperate hunt to get a moose that can feed his family; with the river freezing over, Heimo and Scott race to get his boat off the water; and Bob's daughter and ex-wife return to his cabin to honor his memory.
The loss of Bob Harte is felt across the Refuge. Heimo boats to Bob's cabin to bring Bob's possessions to his family. Charlie recovers his father's shotgun from a hidden survival cache and hunts small game. Edna prepares her favorite meal, caribou head.
Charlie scrambles to secure his first big kill and rebuild his traplines. Heimo's daughter, Krin, and family arrive in the refuge but are tested immediately when their cabin is uninhabitable. Bob hopes to get back to the woods but struggles with his health.
Heimo stalks his best hunting grounds and Tyler tracks caribou as the pressure is on to get a big kill before the harsh Alaskan winter takes hold. Charlie inspects his traplines but damage from summer wildfires puts his season in jeopardy.