They are here for a new mission: to haul the heavy metal of natural gas drilling rigs not only on frozen rivers but also over the Arctic Ocean! In just three months they'll earn a year's salary but they'll have to endure one of the most perilous stretches of road anywhere in the world, where jack-knifing, breakdowns and frostbite are common place and any wrong move could see them sucked into the freezing water as the ice gives way beneath their wheels. It's a treacherous, bone-numbing job - just the kind of challenge that keeps this special breed of driver coming back for more.