In Headlines on the Frontier, the Lone Ranger and Tonto embark on a perilous journey to thwart the plans of the Legion of the Black Arrow, a secretive organization that has emerged in the aftermath of the Civil War. This group is determined to incite a revolt among the Native American tribes, aiming to establish a despotic empire in the West. As they ride through the rugged terrain, they learn of a plot to kidnap Stephen Hayden, an editor who believes in fair treatment for Native Americans, and his daughter, Mary. The stakes are high, as Hayden's progressive ideas threaten the Legion's agenda.