
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.
Rick and Hugh continue their marathon run; Alex comes to the rescue of a local family; Maya gets behind the wheel to take another shot at driving the entire haul road with Dave right behind her; Lisa and Tony continue their heavy-haul convoy.
The season reaches the halfway point; Hugh, Rick and Alex struggle with deliveries to the remote villages of northern Manitoba; the biggest storm of the season descends on the Dalton; Lisa drives her oversize load into the ditch.
Lisa gets blinded by a whiteout sending her into danger; Dave attempts to retrieve his abandoned pipe load; Hugh and Rick head into the most remote terrain of Ontario.
Harsh winter weather leaves Lisa stranded in Prudhoe Bay; Dave tests Maya and Tony's patience; Rick's frustration reaches a boiling point, and he snaps; Hugh rescues Rick's truck.