In the mountains of West Virginia, Alderson Cree is mortally wounded in an ambush by Kip Ryerson, after Kip's wife, Martha, seeks refuge at the Crees's home for herself and her stepdaughter, Eileen. Cree makes his young son, David, promise to avenge his death once he has grown into manhood. As David Cree runs for help, Alderson recants and instructs Martha Ryerson to release his son from his promise. However, to eliminate her brutal spouse, Martha Ryerson remains silent, and George Hedrick, the local storekeeper, leads a crowd to drive Kip out of town. Hedrick later announces Kip's death, relieving David of his obligation to his father. Years pass, and David, now an adult, is engaged to Mary Reddin. When Kip Ryerson returns to town, David's mother demands that he keep his promise to avenge his father. As David pursues Ryerson, Mary meets Martha, his former wife, who confesses that David's father canceled the promise of revenge. Mary rushes to inform David, but she is too late. During a fight between the two men, Kip Ryerson falls to his death from a mountain cliff, bringing to fruition the seeds of vengeance.