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.
Rinty
Ramon
Dolores Valdez
Juan Valdez
Buzz
Amos Harkey
Maria, the Dueña
Sheriff Billings
Limpy
Burke
Jenkins
Red
Red's Partner
