This is the Iditarod, the longest and most dangerous race in the world. Run in March every year over 1,000 miles of fierce, forbidding terrain through the mountains and snowy wastes of Alaska. It has always been Natu's dream to run the race but she has chosen to work, with her fiance, on the oilfields in the north. When she learns of her Inupiat grandmother's death, she knows she must be true to her native culture and return home to prepare for the race.