Wally Reed (
Hal Taliaferro), an undercover agent for the U.S. Post Office, buys a ticket on old Dad West's (
Fred Parker), an old open touring car, as part of his assignment to find out what is behind all the trouble the stage-line has been plagued with. Frank (
Franklyn Farnum) has Spade (
Yakima Canutt) and his gang pull a robbery to keep the mail from going through and to cause Dad West to lose his government mail-contract. But Wally grads the mail sack, hops on his horse Silver (
Silver King the Horse)and "carrys the mail", and saves the franchise.
—Les Adams <longhorn1939@suddenlink.net>