Debogorski, Rowland, Yemm, and Sherwood find themselves lumped in with the other "highway maggots" – the local drivers' term for rookies on this road – and must adapt to new rules and conditions.
The road takes them up the Mackenzie River and over parts of the Arctic Ocean, visiting Aput and later Langley rigs with long stretches in which drivers are out of radio contact.
Alex, Hugh, Rick, and Drew find themselves lumped in with the other "highway maggots" - the local drivers' term for rookies on this road - and must adapt to new rules and conditions.
Word of Drew’s quitting spreads rapidly among the other truckers, but instead of going home, he finds work at a local moving company - driving a forklift at first, then a box truck.
Eric is assigned the job of hauling a much-needed vacuum truck to Mallik; emergency repairs on its suspension and a frozen bolt threaten to ruin this plan, but he does eventually leave in time.
On the way back to Inuvik, transporting contaminated soil, Alex spots emergency personnel attending to a flipped-over box truck whose driver is nowhere in sight.
With the help of a student trucker, Hugh takes his refurbished vacuum tanker to Aput, a natural gas exploration site, to haul away a load of wastewater.
Eric hauls a heat exchanger and a generator for the new site’s truck shop, while Hugh brings a load of rig mats up from Inuvik and later takes his vacuum tanker to Aput.
Meanwhile, Alex takes a water tank and some boards from Inuvik to Tuktoyaktuk and Drew completes his first solo run over the ocean, hauling groceries to the same destination.
Bear takes a boiler onto the ice road, whose surface is now so rough that he makes a risky stop to check that his load is secure before proceeding to Langley.
Hugh has to be careful on the return trip; the battered road is becoming slippery due to the lengthening days, and the liquid in his tanker threatens to slosh around and cause him to lose control of the truck.
Eric and Hugh drive up from Inuvik, the former headed for the Wurmlinger to pick up a load of drill casings, the latter to Langley with his vacuum tanker to pump out the wastewater.
As they return to Inuvik, Kurt climbs into an available truck and drives up to help in the effort, hauling back a snowcat and a survival shack used by the road crews.
At the ice-locked Arctic Star barge, a headquarters for natural gas exploration crews, veteran trucker Jim Gattie picks up a three-trailer load to save time: two pairs of full fuel tanks and related supplies, all on sleigh runners.
Meanwhile, just after Devon takes on two diesel fuel tanks and starts back, he is alerted to a severe water flow on the road directly ahead of him; he stops to re-secure his load, then proceeds slowly through the hazard.
As daily temperatures continue to rise and the ice road keeps melting, Jerry works at full speed to clear all the equipment from the Langley site.
The site’s derrick is loaded onto two trucks, just as in the move from Aput, but the drivers encounter a serious break in the road and must wait for a pilot car to escort them around the hazard.
Drew delivers a load of groceries and a couch to Aklavik, then heads home for the year, while Devon brings a camp shack back to Inuvik.
Eric is slowed down by a surprise whiteout and a lull in the action on site, but eventually picks up some rig mats and storage containers and heads back to Inuvik.
Jerry confirms that Langley is completely clear and clean, and Hugh — the last driver to come in off the road — goes home with Kurt’s respect for a season of hard work.