Experts are predicting one of the shortest and warmest winters on record, forcing the ice road truckers to face their biggest challenge in history. The companies will risk financial ruin and the communities face devastation unless the ice road truckers can defy the odds and make their deliveries within the small window of opportunity that the ice roads allow.

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 breaks down 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.