As the season opens, the race begins for VP Express and Polar Industries. This year both companies face a much bigger adversary, the Polar Vortex, bringing with it the worst winter conditions in a century. With the storm only days away, it's a race for loads. Lisa Kelly and Darrell Ward return to lead team Polar to victory, while Art Burke and Todd Dewey both set out to prove to the boss that they can deliver with the best of them. Meanwhile, at VP Express, seasoned pros and former rivals Alex Debogorski and Hugh Rowland join forces and head out into the frozen frontier.

With temperatures on the rise, conditions on the ice roads quickly deteriorate. The truckers from Polar and VP Express are pushed to the brink, crossing thin ice on their way to deliver critical loads. Lisa and Todd go where no other trucker this season has gone before, tackling a remote road that's completely untouched. After cutting ties with Polar, Darrell races to deliver loads to make up for lost time. Art's mishaps on the ice roads could cost him his job.

With Darrell's new company on a roll, he calls in a surprising reinforcement, but can this new team member hack the treacherous ice roads. A brush with near disaster could cut Hugh's season short. And, Lisa and Todd convoy into unchartered territory on a privately built, unmaintained road through the frozen frontier.

Darrell continues teaching Reno how to drive the ice roads, but Dad's overprotective ways may be too much; Art gets some royal help on a trip far north; faulty wiring could sink Alex's cement load; Lisa and Todd hit a road block in their race to keep Polar in the load count competition.

With temperatures rising and the winter roads quickly melting away, it's a mad dash to the finish line. VP Express and Polar are neck and neck in a race to end the season on top. Polar drivers Lisa, Art and Todd embark on an epic journey up the longest seasonal winter road in the world. VP stays closer to home, traveling treacherous roads in a late attempt to boost their load count.

The end of the line is here. The Polar drivers face the long, difficult journey back down the world's longest seasonal winter road. Lisa has to make a game-changing decision...help a competitor push further into the arctic unknown or stick with her teammates and convoy back to Polar headquarters. Her decision could be costly as conditions quickly deteriorate.

Experts predict a small window of opportunity, so truckers must defy the odds to get their loads delivered or risk financial ruin that will also impact their communities.

At Polar, a truck crashes into a snowbank. Legendary Alex Debogorski makes his return by taking on an untested crossing. The Polar boss tests a new driver. Lisa Kelly encounters a monster incline. Two long-time rivals meet deep in the wilderness.

Lisa Kelly becomes stranded hundreds of miles from the nearest town. Darrell Ward takes a risky off-road short cut that's untested by any other truck. Art Burke comes upon a melting ice crossing and a load that's right at the weight limit. 22-year-old Steph Custance learns whether she'll be driving for Polar.

Darrell Ward and Lisa Kelly head into Alberta looking to expand their company, and encounter a trail called "the Death Road"; Art Burke takes on the ice crossing where he nearly lost his life; Polar's top dog Todd Dewey takes rookie Steph Custance under wing, as she embarks on her first ice-roads journey.

22 year old Steph Custance tries to conquer the first ice roads of her career, but an ice crossing pushes her to the limit. As temperatures rise, Alex Debogorski runs into a road block. Art Burke is acting as a diplomat for Polar by delivering to a new remote community. Darrell Ward braves an unregulated winter road.

Darrell Ward faces off with a trail named "The Obstacle Course". Todd Dewey struggles to clear a melting ice bridge. Veteran Alex Debogorski is pushed to his limits hauling an oversized fuel tank and Art Burke finds an ice crossing in the middle of the night.

Polar driver Steph Custance braves one of the longest ice crossings on the winter roads map and to make things worse, she is all alone. Darrell Ward attempts a triple delivery in a single day, meanwhile Lisa Kelly is stopped dead in her tracks by an engine fire. Todd Dewey celebrates his birthday stuck on the edge of a closed road.

Todd must fix his truck or risk being stranded 100 miles form the nearest town. Alex Debogorski has to cross a creek that has thawed in the middle of the road. On an important run for Polar Industries, Art Burke receives some news that could be devastating. Lisa Kelly battles an ice crossing unlike any she has seen before.

As the end of the season nears, Polar Boss Mark Kohaykewych makes a historic deal with Darrell Ward and Lisa Kelly to team up for a four truck convoy over a closed road. Alex Debogorski must complete one of the longest trails in the final hours to make a delivery and Art Burke's truck breakdowns on the ice.

The four truck convoy faces fire and an ice crossing so thin, they must test the thickness themselves. After Art Burke's engine dies, he must ride back with Alex Debogorski to Winnipeg over a trail that destroys the old pro's truck.

The truckers attempt to deliver their loads as a huge storm approaches. Lisa and Art have to deal with a deadly shutdown. Darrell and Todd don't get along and Alex is searching for divine assistance on thin ice.

A brutal storm descends on the winter roads, and frozen hell comes with it. Blinding winds, driving snow, and bone-chilling cold assault the ice road truckers as they fight their way through the storm of the century to deliver their critical cargo. But even the toughest truckers on the planet are no match for Mother Nature, and losing this battle might cost them their lives.

A monster storm brings record breaking snowfall onto the winter roads. Polar drivers Darrell and Todd try to muscle through, while the rest of the team fights to survive, stranded in the wild with no help in sight and no hope on the horizon. Meanwhile, despite frigid temperatures the war between VP Express and Polar reaches a boiling point.

The battle royal with Mother Nature continues as the Ice Road Truckers fight through the storm of the century. Art, Todd, and Lisa press their luck on ice that is buckling under the weight of heavy snow. As conditions deteriorate, Alex is left running on fumes and in desperate need of a lifeline. Darrell goes toe-to-toe with his boss in a fight that'll be a game changer on the winter roads.

A defection in the ranks takes the battle for the winter roads to a whole new level. Hugh hatches a plan for VP Express to crush the competition, hauling the most lucrative load to date across treacherous terrain. The pressure is on Todd and Lisa to up their game and push further out into the frozen frontier.

Lisa and Todd embark on one of the toughest missions of the season, tackling an untamed trail dubbed the `Highway to Hell'. Darrell Ward steals business out from under his former boss at Polar Industries. A crash could mean the end of Alex's trucking season.

Austin's heavy haul through snow leads to a rookie mistake; Darrell is sorely tested by an infamous pass; Porkchop is assigned an unexpected load; Hugh enlists a motley crew to drive across ice; and a one-lane mine road pushes Alex to the limit.

In the midst of the early thaw, Darrell and Lisa struggle to make it home over the hardest hit trail on the winter roads system. Art and the King of Obsolete reunite to haul a giant double trailer over over a slick path. Veteran Alex Debogorski races against the clock to deliver to a town in need before the road closes, while fellow Polar driver Todd Burke finds a unique way to conquer a melted ice crossing.

Rick makes an unpleasant discovery about his truck; Alex hauls a dangerously heavy excavator; Lane gets out on the road.