Framed as a flashback told by a grandfather, the story follows Captain John Evans at Fort Sheridan, whose life shatters when his restless wife, Martha, elopes with a trapper. Leaving the army behind, Evans moves with his young son to Montana to start fresh as a ranch foreman, while an embittered Martha ends up singing in dance halls. A year later, a chance encounter in a trading town brings father, son, and mother back together, ultimately leading Evans to confront Martha's abusive partner and reconcile with his repentant wife through their son's intervention.