The balance of power on the winter roads is turned upside down. Reigning champ Polar Industries returns, looking to maintain their dominance by any means necessary. But trucking rival, Darrell Ward, isn't backing down. He wants to turn his upstart company into a force on the winter roads. His first order of business is poaching an ice road legend out from the grips of Polar Industries. The bold move sparks an all-out war on the frozen frontier.

The war for ice road supremacy is heating up and Polar Industries is pushing their drivers to the absolute limit. Art Burke must cross one of the longest winter roads in the world. Polar's top driver, Todd Dewey, is forced to dig himself out of mountains of fresh snow or risk a dangerous night in freezing temperatures. Rival, Darrell Ward, takes a load over a newly opened road littered with abandoned trucks frozen in time.

Polar Industries goes for the record books, sending driver Todd on a risky run to deliver the heaviest load in company history. But will the weight prove to be too much on a tenuous ice crossing? Art is sent on a high stakes rescue mission and finds the job more than he bargained for. Lisa lands an exclusive contract over one of the wildest trails in Canada. Darrell steals a load from Polar, leading to a clash between him and Mark.

Polar boss Mark Kohaykewych shakes things up when he brings new soldier Mike Simmons into the winter roads battle. But when the rookie's paired with company wildcard Art Burke, it makes for a rocky trip. Top dog Todd Dewey and rival Darrell Ward both hit a newly opened trail, but when Todd breaks down in the middle of nowhere, he might be out of luck and out of time. Polar veteran Alex Debogorski gets lost and must rely on pure instinct to find his way out. And new business owner Lisa Kelly faces an ice road trucker's nightmare on a dangerous crossing.

New business owners Darrell and Lisa get the jolt they need with a high-stakes mission-transformers desperately needed for a distant town's electrical supply. Polar's top dog Todd Dewey runs into trouble with a government contract. Truck problems have Polar driver Art Burke's season headed for the gutter. And ice road rookie Mike Simmons tries to get over the hump on his first solo delivery.

Darrell Ward and Lisa Kelly try to make good on a power play for their young company but could lose everything when Darrell's truck breaks down. Polar driver Todd Dewey must backtrack hundreds of miles to recover lost freight or risk losing a vital contract. Rookie Mike Simmons' inexperience costs him on one of Canada's toughest winter roads. And as trails and crossings continue to melt, Art Burke finds himself fighting for his life on the ice.

The battle gets down and dirty as the roads melt beneath the drivers' wheels. Art Burke fights to keep his rig above ground on a melting ice crossing, while fellow Polar driver Alex Debogorski fights his way up a mud covered mountain. Renegade rivals Lisa Kelly and Darrell Ward struggle on a trail at ground zero of the thaw, where getting stuck could sink their company for good.

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.

The two rival companies join to take on the biggest challenge in Ice Road Truckers history - pulling a cat train across the Hudson Bay. But when the untested ice shatters under the the weight of the heavy haul, it becomes a desperate fight for survival.

In the season's dramatic finale, Lisa and Todd struggle to complete their daring joint venture across the frozen Hudson Bay. Darrell braves the most torn up trail remaining on the winter roads. Art must face the last open ice crossing and his first since his near fatal trip weeks earlier. Deep in the thawing wilderness, a tanker sideswipes Alex.