Two men plodded wearily beside a dog sled loaded with furs. The early Arctic darkness was descending, and Bob Andrews looked up at the leaden sky apprehensively. It looked like they were due to get more snow. The men and the dogs are so tired, so they're looking forward to arriving at their cast, where their supplies are buried. But when they arrive, they find that someone has stolen their supplies! Bob is so angry that he heads off into the wilderness, following the tracks of the person who took their food...