Rex Allen ('Rex Allen'), a U. S. government veterinarian, rides into the picturesque town of Pine Rock, near the Canadian border, to take the place of the regular vet who is on vacation. Used to doctoring animals in Texas, Allen finds out that herein the heart of the fox-farming industry, he is to doctor the most finicky and high-priced of fur on four feet. On the farm of Mel Richards (Tom London), Allen learns the habits of the valuable creatures from Richard's niece, Jane (Mary Ellen Kay, and her ten-year-old brother Danny (Jimmy Moss'), and on his own learns that the trusted owner of the trading post, Steve Baxter (Roy Barcroft) heads a gang that is smuggling counterfeit money across the American/Canadian border in the fox cages.

Directed by: William Witney
Written by: Albert DeMond
Runtime: 67 minutes
Tagline: RIDE!..REX...RIDE! - HIT THE TRAIL TO HIGH ADVENTURE!
Cast:
Rex Allen Rex Allen
Rex Allen 
Slim Pickens Slim Pickens
Slim 
Roy Barcroft Roy Barcroft
Steve Baxter 
Forrest Taylor Forrest Taylor
Mel Richards 
Mary Ellen Kay Mary Ellen Kay
Jane Richards 
Jimmy Moss Jimmy Moss
Danny Richards