Lovington's Territorial Bank is robbed by the notorious Red Buck Gang who shoot their way out of town abducting two prostitutes. Marshal Charlie Pruit tries to form a posse to go after them but the only man willing to volunteer is a former slave, Addison Jones. The lawmen follow the trail of the murderous gang across the Llano Estacado into the mountains of New Mexico, encountering a mystical figure and the richness of Hispanic culture in early New Mexico.