Sheriff Steve Tucker knows Slim Carter is guilty of murdering Bart Jones. US Marshall Dan Calloway won't let him act without proof. Now Carter is planning to run away with, and marry, Nancy Merrill, daughter of the wealthy Zeke Merrill. Is Slim Carter the honest man Nancy believes him to be? Or is he the murdering thief Sherriff Tucker is convinced he is? It's up to the Lone Ranger and Tonto to discover the truth.