John Farnum returns from India with the 'secret of the jewels', two small chains that turn sand into jewels. Outlaws know about the chains and are after them. But Tom, sidekick Bud, and the wonder dog King are there to repeatedly fight off their attempts.

Rex Lease
as Tom

Harry Todd
as John Farnum

Virginia Brown Faire
as Ruth Farnum

Joe Bonomo
as Bud

Josephine Hill
as Pearl - Gang Moll

Bob Walker
as Joe

Al Ferguson
as Clyde Winslow

Edmund Cobb
as Prince Kuva

Muro the Dog
as King