Annie and Lofty try to locate a desperate outlaw wanted for the murder of a lawman, but Tagg is more interested in trying to find a prospective husband for a shy schoolteacher.
A Dutch gunsmith shows Annie the revolutionary new rifle he has developed for the army of his adopted country, but word of it spreads and outlaws become interested.
The Grangers are unaware that the charming young man from Boston, who has come to look over their ranch, is an outlaw planning to purchase it with the money from his first holdup.
When a boy whose father was killed asks for help finding a ghost town before he goes off to live with his aunt, Annie becomes afraid for his and Tagg's safety.
A stranger seems to be unduly interested when an old prospector who has struck it rich makes plans to open a new bank that will specialize in loaning grubstake money to other prospectors.
Annie becomes a boxing promoter to raise money for a new school, but then outlaws break out of jail and try to steal the funds that have been collected.
When his grandson actually comes to visit him, an old prospector who has been writing to the boy with tall tales of his imaginary exploits, actually tries to live up to his tales by capturing an outlaw gang.