Steve Lannon is a retired gunman and reformed-outlaw who has left his ranch and is living in seclusion in San Francisco. He receives word that rustlers are on the rampage in the area of his ranch, and have stolen his horse, Silver. Steve returns to Nevada to take care of this matter.

Rival telephone crews are in a race to be the first to connect telephone service between Rawlings and Cheynne, Wyoming. Lineman Tom Remington's girlfriend is the daughter of one crew foreman, who wants to win the race in order to re-establish himself in the business. However, the foreman of the other crew has his own scheme to win the race, and will stop at nothing--including kidnapping--to accomplish it.

Phil Dolan (aka Black Jack because of his talent at cards), Nancy Dolan, and a rustler all have a piece of a silver dollar with each piece having a portion of an indented map of an ore mine. Phil has to rescue Nancy from the rustlers to keep their portions of the silver dollar from the rustlers. The sheriffs's pose captures the gang of rustlers just as they reach the ore mine ensuring their claim to the mine.