A chopper pilot picks up a team of scientists, but with a heavy load of fossils and bad weather approaching, the scientists may have to make the choice of their research getting a lift or themselves getting a ride.

The Iron Dog is known as the longest, toughest, most extreme snowmobile race in the world. Racers brave wildly dangerous terrain, bitterly cold temperatures, and speeds well over a hundred miles an hour in this two-thousand-mile endurance race. To make their journey possible, the snowmobile racers on the ground rely on their Alaska Wing Men to be their flying "pit-crew."

Zaz, a fourth generation pilot, flies support for a snowmobile race in the bitter cold above the Arctic Circle. And Dustin of Coastal Helicopters risks a dangerous drop-off while transporting a group of world-famous heli-skiers into the remote mountains they love. Finally, the legendary Don Lee helps a young romantic execute a top-secret mission.