Overview
A fire in the mountains drives a wolf pack into the nearby desert where they terrorize the local residents. The leader of the wolf pack is Lobo, actually a halfbreed (Rin Tin Tin). When the pack is discovered hunting a herd of cows, a posse gives chase. Lobo leaves his pack to lead the posse away. He is injured and found by a local prospector, Dave Weston (Charles Farrell). The prospector nurses Lobo back to health and the two become close friends. Meanwhile, Weston has made a Borax find in the area. His girlfriend May Barstowe (June Marlowe), daughter of a wealthy rancher, is pleased. However, the local chemist, Borax Horton (Pat Hartigan), actually a claim jumper, plans to steal the claim.
| Actor | Age then | Age now | |
|---|---|---|---|
 | 7 | August 10, 1932 (13) | |
| - | - | |
 | 25 | May 6, 1990 (89) | |
 | 22 | March 10, 1984 (80) | |
 | 45 | July 30, 1959 (79) | |
 | 53 | March 5, 1932 (59) | |
 | 43 | May 8, 1951 (69) |