The Iditarod dogsled race is one of the most gruelling endurance tests in the world. The course stretches 1,850 kilometres through Alaska's rugged terrain, spanning treacherous mountain ranges, frozen rivers, dense forest and desolate tundra. Temperatures plunge as low as negative fifty-one degrees Celsius and winds upward of eighty kilometres can cause complete loss of visibility. At age twenty-three, and despite being legally blind, Rachael Scdoris counts herself among the Iditarod finishers. As she sets out to compete in her third Iditarod, hoping to beat her previous time, she faces numerous obstacles. In addition to the challenges of the course itself, she must deal with rivals and critics who scrutinize her every move and question her unorthodox strategies. Joining Scdoris on the trail is Joe Runyan, who serves as her visual interpreter. He won the race fifteen years ago. Now fresh off his second divorce and pushing sixty, he is looking for new challenges.