When winter unleashes its full fury Kyle and Ben get caught in its crosshairs. In Alaska, Marty's gamble on new country pays off. The polar assault brings Eustace's progress in North Carolina to a standstill. And far north in Maine, Charlie breaks the ice to finally cash in on some fur.

In the Revelation Mountains of Alaska, Marty faces off with a vicious wolverine. In Montana, Rich tries to protect a young family from a hungry predator while Tom Oar battles the bitter cold to build a primitive teepee. And in Maine, one wrong step has Charlie Tucker fighting for his life.