The sun returns, signaling late winter in ANWR. An unwelcome intruder threatens Tyler and Ashley's success. Heimo and Edna say a final goodbye to their oldest cabin, while Charlie meticulously builds his very first and reflects on his future in the bush. The Seldens embark on a 4-day trapping loop that could lead them through dangerous conditions. Heimo must compete with a pack of wolves to secure a moose for winter. The Lewis cabin is rehabbed, but the girls still have a lot to learn about this new home.