Winter arrives, as Otto and Charlotte struggle to round up the cattle; Atz Lee and Jane reach a decision about his cabin; Eivin and Eve go fishing on the new boat; and Shane and Kelli brace for unexpected health news.
The Kilchers rush to complete jobs as frigid temperatures sweep into the region; Otto and Eivin salvage the shores of Kachemak Bay; Atz Lee attempts to put a roof on his cabin before snowfall; and Charlotte and Jane encounter a predator.
Changes occur on the homestead as autumn arrives; and Otto and August clash during their last mission before August leaves for college. Later, Atz Lee Sr. and Jane work on Atz Lee's new cabin; and Eivin builds a special surprise.
Otto risks his recovery to help save a paralyzed cow; and Jane and Atz Lee put their differences aside to prepare for winter. Later, Atz gets ready for a visit from his daughter, singer-songwriter Jewel.
Levi travels to Alaska to lead the spring cattle drive with Ervin while Otto recovers from surgery. Later, Otto's unwillingness to step aside puts him in danger; and Atz and Atz Lee test their survival skills in the backcountry.