A mine owner is attacked on the road. When Roy and the sheriff begin their investigation after Roy and Pat get attacked as well; they begin to suspect Sarah Granby, the owner of the local laundry is working with a group of high-graders.

When Sheriff Blodgett is shot at while investigating a gang of rustlers, Roy is named the acting sheriff. However, another deputy by the name of Morgan isn't happy about it and tries to stall Roy's investigation. As a result, Roy gets suspicious and soon discovers that Morgan wanted the job because he was working with the rustlers.

When outlaw Rod Miner arrives in Mineral City to see his father, who owns the General Store, he soon discovers that a Federal Marshal is on his trail. After Rob and his gang ambush the marshal, they attempt to kill Roy.

A group of outlaws stages a hold up at city hall for the tax money that's in the safe. When they make a break for it, only to discover they get into the wrong wagon and have an extra passenger in the form of a baby. When Dale, Roy, Pat, and the sheriff discover the mistake that was made, they frantically try to track them down to save the baby.

After hearing an old prospector brag that he struck it rich in Dale's café, an outlaw gang, headed by the sheriff's brother, decides to rob him of his claim. Roy sets out to stop them and keep the old man safe.