After his family is murdered in the 1880s, orphan Jeb Rand (Robert Mitchum) is raised by the Callum family on their nearby horse ranch. He remains haunted by this childhood trauma in a recurring nightmare of flashing spurs and confinement inside a trap door as his family is slaughtered. Widow Callum (Dame Judith Anderson) does her best to make Jeb feel loved as he is growing up, but the young man stubbornly maintains a sense of his own identity. While he has great affection for his foster-sister Thor (Teresa Wright), his relationship with her brother Adam (John Rodney) is tenuous at best, especially when Jeb blames him for shooting a colt that he was riding. Although Mrs. Callum blames the incident on deer hunters, she is aware that the it was actually the attempted murder of the youngster by her brother-in-law Grant (Dean Jagger), a shadowy figure who, for vague reasons, is determined to harm Jeb. Jeb loses a coin flip with Adam, and becomes the designated family volunteer to fight ...