Hoppy tries to prove that a traveling preacher is behind a series of robberies by three men who have a habit of vanishing into thin air.

Hoppy's efforts to save a young woman's mine from swindlers are complicated when Red Connors develops amnesia and claims to be a Spanish nobleman.

Hoppy uses an intricately carved bracelet to trap some swindlers who are trying to cheat the Indians out of their oil-rich reservation lands.

Hoppy helps government agents search for a herd of 625 stolen horses intended for the Spanish-American War, but when he finds the animals, he has to save them from a grass fire.

Hoppy and Red combat a rancher and a crooked lawyer who are trying to drive immigrant settlers off their land.

Hoppy uses an incriminating letter and a crooked card deck to hunt down the murderers of a small boy's parents.

Hoppy and a young minister try to convince a boy who's just committed his first holdup that his gunman idol has feet of clay.

Hoppy tries to trick an elderly woman's kidnappers by inducing Red Connors to wear her clothes.

Hoppy saves an innocent man from hanging and tracks down a murderer who's manipulating the feud between two rival ranchers.

When Red Connors buys some arid land on the strength of a promised irrigation project, Hoppy investigates and learns that the promoters of the scheme are guilty of forgery, embezzlement and murder.

Hoppy helps a young man and woman who are framed as counterfeiters just before they are to claim their uncle's estate.

In his search for a gang counterfeiting Mexican currency, Hoppy learns that the Twin Rivers newspaper is printing more than news.

While investigating raids by white men dressed as Indians, Hoppy and Red find valuable copper on the Indians' land.

While chasing a murderer, Hoppy and Red are locked in a shrine with an emerald religious statue during a Mexican festival.

Hoppy and Red discover that two outlaws have ambushed the sheriff of Stone Valley and determine to help the local ranchers against an exploiter who wants to take over the valley and sell it ti the cavalry.

Hoppy fakes amnesia in an attempt to save the cattlemen's bank and the local ranchers from ruin springing from an embezzlement.

Hoppy poses as a cattle buyer in order to break up a ring of thieves who are stealing gold from a smelter.

Hoppy tries to prove that a gypsy boy's dead father was not a thief so that the boy can marry his sweetheart.

Hoppy risks death to convince the family and friends of vanished rancher Tom Murdock that his ghost has not returned from the dead to haunt them.

Hoppy steps in when the nephew of a contractor building a railroad is killed and all the construction plans stolen.

Hoppy and Red arrest a young man whom they find wounded near the body of his uncle, but they soon learn that he's suffering from amnesia and try to clear him.

Hoppy tries to help an ex-convict, hoping to go straight, who is being blackmailed into joining a plot to rob the Cattlemen's Association.

A blind Mexican woman asks Hoppy to help her fugitive son, who's been falsely accused of murder.

Hoppy and Red try to settle a dispute between cattle ranchers and sheep grazers.

Hoppy uses a health tonic to prove the innocence of a convicted murderer and the guilt of the real killer.