A cowboy whose friend has been swindled out of his ranch and then murdered must take care of the man's son, then he goes after the killers.

Canadian Mountie Mason (Bill Cody) is sent south of the border to look for a horse thief with only a watch chain for evidence. He befriends young Andy (Andy Shuford) and when Calhoun (LeRoy Mason) hits Andy, Mason and Calhoun fight. In the scuffle Calhoun's watch with the missing chain is dislodged. Mason then sets out to bring in Calhoun and his gang.