People who hunt fur in the Rocky Mountains, like Abel and Henry Iron, are having a hard time making money. Beaver is what they search for in the mountains, and they make a small living in the western wilderness. The Iron Brothers are on the run after a mistake leaves one Indian dead and one dead. In the mountains, Abel and Henry run away from the warriors who are following them. They do this together. In the end, they will find out if the bond of brotherhood will be enough to keep them safe.