A prospector is murdered by The Cactus Kid and his gang, who hope to find the murdered man's goldmine. The miner's dog, Rin-Tin-Tin, recognizes the killers, who thereafter seek to use the dog to locate the lost mine. With the help of a government agent and a young girl, Rinty saves the mine and brings the bad guys to justice.
as Rinty
as Ramon
as Dolores Valdez
as Juan Valdez
as Buzz
as Amos Harkey
as Maria, the Dueña
as Sheriff Billings
as Limpy
as Burke
as Jenkins
as Red
as Red's Partner
