After having a conversation with the chief of the Acuna Indian tribe about his suspicion of someone stealing from a mine on their reservation, Roy finds the chief murdered and several samples silver ore from the mine gone. Calling upon Dale, Pat, and the sheriff to help him investigate, they soon discover that the prime suspect is the owner of a local trading post.

A string of cattle rustling seems to be stymieing Roy and the local authorities, because it seems the livestock is vanishing into thin air. However, when a group of strangers start arriving in town and insist that Dale buy their cheap supply of meat, Roy gets suspicious that they're behind the thefts.

Dale gets tricked by some con artists into selling them her ranch. The swindlers then promptly sell her ranch to a newcomer into town who unknowingly gets swindled as well. Realizing that something is running afoul, they work together to help Roy and the sheriff to bring them to justice.

Roy, Dale, and Pat come across an old prospector who was attacked and blinded by a pair of outlaws. When they learn that the outlaws stole some ore samples that the prospector recently found in a nearby mine, Roy offers the old man the use of his dog Bullet to help find more ore in the mine. Through the course of their investigation, they discover that a friend is one of the outlaws, out to kill the old prospector and anyone else who gets in their way of collecting on a big strike.

A young woman from Connecticut arrived at Dale's café looking for her father. When Roy, Dale, and Pat take her to her father in a nearby ghost town called Red Dog, they soon learn that claim jumpers are trying to scare him out of town in order to reap the benefits of a railroad wanting to come through the town.

Dale and Roy are worried about when Dale's nephew Bob, who just arrived in town, starts hero-worshiping a local and notorious gunfighter. However, when Bob finds out that his hero is the leader of a gang who plans to hold up the local mine owner, he sees the man in a new light.

Roy, his friends, and a pair of children Pat are babysitting are taken hostage by the Wolf gang. When one of the kids comes down with the mumps, all of them are forced to be quarantined together for 24 hours to see of any symptoms appear in the adults.