Set during the 1920s, Prairie Nocturne finds Susan Duff, the young songbird from Doig's Dancing at the Rascal Fair, now a middle-aged singing coach living in Helena. When her old flame Wes Williamson asks her to mentor his black chauffeur, Monty, she agrees. But racial tensions erupt when Susan's private lessons with Monty attract the attention of the KKK.
