Canadian Mountie Mason is sent south of the border to look for a horse thief with only a watch chain for evidence. He befriends young Andy and when Calhoun 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.
You can now watch Mason of the Mounted online on the following streaming providers in the United States.
| Directing | Harry L. Fraser | Director |
| Production | Trem Carr | Producer |
| Writing | Harry L. Fraser | Story |
| Writing | Harry L. Fraser | Screenplay |