
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.

The truckers form a convoy for the first time ever to deliver supplies to Nuiqsut before the road turns back into water.

When a Haul Road legend dies, Ray leads the trucker's son to scatter his ashes; Lisa gets her biggest break yet; Alex discovers Alaskan gold, Jack hauls a highly explosive fuel load; Greg faces the challenge of trucking a mega-reel of pipe.

Alaskan temperatures rise as the deadliest time of the year approaches; the DOT races to stop an overflow that could threaten the Dalton; Jack and Lisa convoy together; Greg and Ray use the buddy system; Hugh gets busted.

The truckers battle to determine this year's King of the Haul Road; tensions between Ray and Greg explode on Atigun; Lisa's possible best season ever is on the line; Jack's hope to repeat as King is in jeopardy; Alex pushes to beat his nemesis.