Andrew and Gerrid return victorious from the moose hunt, uniting the band for the first time. But a sudden cold spell leads to a scramble to make winter shelters. Oliver's refusal to follow the group's plan leads to an explosive confrontation.

A disastrous fish haul threatens the colony's food supply. Pushing to build a second outpost, Adam sets off down river alone but when his canoe capsizes, he's at risk for hypothermia. Tensions between Oliver and the group reach a boiling point.

Oliver's refusal to help prep fish is the last straw for Andrew and Jennifer, so the outpost founders push the others to force Oliver out. A sudden temperature plunge cuts Adam and Evan's bear hunt short. Winter's coming but the group is far from ready.

Adam and Evan make a journey to basecamp and Oliver tries to survive solo.

The battle over the food supply becomes the last straw for Adam, Evan, Christine and Gerrid. Andrew and Jennifer are abandoned at base camp. Adam and Evan join Oliver on a nearby claim, leading to a final confrontation with Andrew.