The first half consists of Paulsen's early experiences running sled dogs in Minnesota and then in Alaska, and the second half describes the roads and animals he faces in the Iditarod Trail Sled Dog Race.
In the first section, we find Paulsen recounting his early days with sled dogs in both Minnesota and Alaska. The second part delves into the routes and animals he navigates through while competing in the Iditarod Trail Sled Dog Race.