The love between trader's daughter Katie McCabe and Lakota warrior Black Moon has survived misunderstanding, treachery, absence, abduction, and tragedy, but the ever-increasing hostilities between the soldiers and the Sioux plant seeds of uncertainty in Katie's mind as to where she belongs - the white world into which she was born, or Black Moon's Lakota world in which she has chosen to live. As tensions intensify over the plains and Black Moon rides with Crazy Horse to rid the Powder River country of the Long Knives, Katie joins a wagon train and embarks on a journey of self-discovery, setting into motion events as turbulent as the restless wind.