Thor is a huge grizzly bear who lives in the Canadian Rockies. Jim Langdon, his guide Bruce Otto, their Native American companion Metoosin, along with Langdon’s hunting dogs, all have one aim, which is to kill Thor. They track him through the mountains, during which time he adopts an orphaned black bear Muskwa, and meets with his mate Iskwao and his older offspring Pipoonaskoos.
