Ken, an ex-WWII GI, returns home after he's paralyzed in battle. Residing in the paraplegic ward of a veteran's hospital and embittered by his condition, he refuses to see his fiancée and sinks into a solitary world of hatred and hostility. Head physician, Dr. Brock cajoles the withdrawn Ken into the life of the ward, where fellow patients Norm, Leo and Angel begin to pull him out of his spiritual dilemma.
Out fishing one day, painter John Hammond and his son Chris come across Bert Hillman, the foreman of a local ranch. He and his ranch hand are searching for a wild dog that killed one of their sheep. They find the animal and kill it, along with one of its puppies, but after they leave Hammond and his son discover another puppy still alive. They take it home and call it Rocky. John believes that a dog descended from sheep-killers will himself become a sheep-killer someday, but e gives his son a chance to raise and train the dog, hoping that he can train the killer instinct from it. Unfortunately, local farmers have reported an epidemic of sheep-killings, and they suspect that Rocky is responsible for them.
