Set during the old west Bearheart the dog witnesses his master an old mountain man being murdered by bandits. Bearheart tracks down the killers to a nearby town and is mistakenly labeled a vicious dog when he is seen attacking one of the killers. Chased out of town by the local townspeople where he is forced to survive the many hardships of the rugged wildness and the wild animals that reside there. After escaping many scrapes with danger Bearheart is finally united with a family who gives him a loving home and friendship.