The Laguna Dam is to be built in Arizona to supply water to desert-land unfit for cultivation or stock-raising. Rival companies bid for the building contract, which leads to violence and danger for Bob Owen and his dog Satan.
| Actor | Role |
|---|---|
 Rin-Tin-TinSatan | Satan |
 Jason Robards Sr.Bob Owen | Bob Owen |
 Virginia Brown FaireMarcella Bradley | Marcella Bradley |
 Tom Santschi'Sandy' Sturgeon | 'Sandy' Sturgeon |
 Dave Morris'Wyoming' Willie | 'Wyoming' Willie |
 Theodore Lorch'Bull' Storm | 'Bull' Storm |
 Wilfrid NorthTom Bradley | Tom Bradley |
| BBen WalkerCrook | Crook |