After Abbott, a schoolteacher, breaks the windows in Mawson's saloon because it is too near the school, Dink Davis' henchmen hold her hostage in Mawson's cabin.
A swindler sells worthless land to a professor and, when the land proves to have a rich silver lode, he tries to regain ownership by nefarious means.
An anonymous letter and counterfeit bill brings Hoppy and gang to a Mexican border town where they find a ruthless town boss that uses an idle mine for a counterfeit operation.
California learns he shares an inheritance under interesting circumstances. Murder ensues, so Hoppy begins an investigation.
Needing supplies, Hoppy and gang go to Mesa City and find a big celebration about an irrigation project...but that the project promoter is a crook.
Hoppy and gang discover a wounded young woman who they learn is being intimated by a judge.
