Supposedly a deaf-mute, Jack Taylor arrives in Valley City at the same time that Postmaster Dad Warner is threatened with the loss of his job because of the many recent mail thefts. Taylor suspects Warner's clerk, Law Sleeman, and is consequently captured by a gang led by local politician Dick Blackwell.
| Actor | Role |
|---|---|
 Fred ThomsonJack Taylor | Jack Taylor |
 Hazel KeenerLillian Warner | Lillian Warner |
 George B. Williams'Dad' Warner | 'Dad' Warner |
 Richard HeadrickLaddie Warner | Laddie Warner |
 Frank HagneyDick Blackwell | Dick Blackwell |
 Horace B. CarpenterSheriff Sam Hull | Sheriff Sam Hull |
 Bud OsborneLaw Sleeman | Law Sleeman |
 Bob ReevesDeputy Sheriff 'Shorty' Turner | Deputy Sheriff 'Shorty' Turner |
 George NicholsSilas Horton | Silas Horton |
 Silver King the HorseJack's Horse | Jack's Horse |