
Truckers with nerves of steel take their lives in their hands driving heavily loaded vehicles across frozen lakes to deliver supplies to remote locations in Canada and Alaska. Whether they're bringing supplies to Canadian diamond mines, supplying offshore oil rigs in Alaska or even charting new territory driving over frozen swamps and rivers to bring much-needed supplies to small towns, these extreme truckers face troubles from their machines and from Mother Nature.
Hugh and Rick run into Alex and decide to convoy north together; Alex surprises Hugh with a late Christmas present; Lisa and Tony haul record wide loads; Maya gets into trouble on Koyukuk's steep grades.
A storm delivers deadly driving conditions as the truckers struggle to deliver their loads.
Darrell and Todd try to get through record-breaking snowfall, while the rest of the team fights to survive; despite frigid temperatures the war between VP Express and Polar reaches a boiling point.