Young Terrill "Rill" Lambeth could ride and shoot with the best men in the South. When her widowed, war-ruined father packs up a caravan and drives toward Texas, she gets the chance to test her skills and prove herself on the rugged and dangerous trail west. Facing harrowing buffalo stampedes, harsh elements and even harsher men takes every bit of Rill's strength. Still, it is only when a quick-shooting vaquero, Pecos Smith, joins her perilous trek that the lives of Rill and everyone else in the caravan are changed forever.