Men of the Cannon ranch are caught in the middle of a confrontation between a neighboring rancher and a young cavalry officer determined to arrest him.

When Lt. Jason Adams reveals his intent to bring in neighboring rancher Henry Simmons on a long-standing desertion charge, Billy Blue makes an ill-advised effort to warn Simmons and his daughter Martha. Resigned to giving himself up, Simmons prepares to do so but, fearing for her father's life, Martha reacts and provokes a military siege of their home.