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.
Director: Richard Thorpe
Screenplay: Harry L. Fraser, William P. Burt, Bennett Cohen
Producer: Nat Levine
Director of Photography: Benjamin H. Kline