McVey orders two of his Rangers, Dave and sidekick, Chito Rafferty, to infiltrate the ring posing as criminals.
Durkin and Benson, two of the gang from the stagecoach robbery, enter the bar to wrest the gold from Dave and Chito.
Carlton's engraver, Simms, who also owns a feed store, is suspicious of Dave and Chito who are strangers.
When confronted, the blacksmith says his name is Burt Conroy and he is a secret service agent working undercover.
The gang suspect Dave and Chito of being informants, but Carlton disagrees and believes someone else in town is acting undercover.
Dave and Chito warn Conroy that Carlton suspects only a carrier pigeon could deliver a message fast enough to have thwarted the raid.
McVey and his rangers arrive to arrest the gang just as Dave and Chito run out of ammunition.