Will Lockhart (James Stewart) leaves his home in Laramie on a mission to find out who was responsible for selling repeating rifles to the Apaches who killed his brother. Landing in Coronado, New Mexico, he finds that most of the territory is owned and ruled by Alec Waggoman (Donald Crisp), a fierce patriarchal rancher with one loose cannon son, Dave (Alex Nicol) and another surrogate son, Vic Hansboro (Arthur Kennedy) running the Barb Ranch. As he digs deeper, Lockhart finds he is in the middle of two wars, one of which may eventually conclude his revenge fuelled mission.
