It is Iditarod day. Fifty-six dog teams will race through 1,151 miles of rugged Alaskan terrain from Anchorage to Nome. Akiak knows these miles well. As lead dog, she has raced the incredible trail before, but never won. She is ten years old: if she is going to win, it must be now. When snow hurts her paw on the fourth day out, Mick, her musher, must leave her behind and continue the race without her. The rules say once a dog is dropped from the race,...