Two irate trappers murder a government agent after he orders an end to beaver trapping in the regin. Pete the peddler a distant cousin of Pat Brady, is later urged to sell the illegal pelts.

Tyrannical Boston financier Jackson C. Revere travels West to confront his son, who has pledged to support himself in Mineral City despite his father's lack of faith in his abilities.

Craig Ormond arrives in town after he supposedly murdered Andy Norton's father. Andy, who is about to be married, postpones the wedding in order to avenge his father's murder.

A gang of bandits robs city hall of tax money and escapes in Dale's wagon, which also carries a small baby as a passenger.

Roy is abducted by the Wolf gang, but the leader comes down with a case of the mumps which quarantines the whole group and gives the law a chance to subdue the outlaws.

Two crafty old codgers arrange to have a strongbox stolen from their own transportation company. The thieves steal Nellybelle in order to haul the loot, thus putting Roy, Dale, and Pat on their trail.

The leader of a robbery and rustling gang tells Roy and Dale he didn't steal funds from a school and sets out to find the guilty party.

When the offices of the law are turned over to students in honor of Boy's Day, Bob Miner is named sheriff and his unscrupulous uncle takes advantage of the opportunity to acquire adjoining land from an elderly rancher.

When the Castle gang hears Roy and Dale say ""The Key to the greatest treasure in the world is in that book,"" they resort to violence to gain possession of it.

Sheriff Tom Blodgett is shot while investigating a rustling gang. When Deputy Morgan seems to hinder attempts to apprehend the gang, Roy realizes that he is in cahoots with them. When Roy, Dale, and Pat are subsequently trapped, Nellybelle actually saves the day by overpowering the badmen.

A young witness whose testimony can send the Collins gang to prison is pursued by the outlaws who hope to silence her permanently.

Pat and a distant cousin are informed that they've co-inherited a ranch which some unscrupulous people covet because of its valuable grazing land.

A swift, mysterious desperado called The Larabee Kid has been hijacking stolen loot from thieves who prey on stagecoaches. As it develops, he is actually the son of a slain marshal, seeking vengeance on the outlaws who murdered his father.

Beaver Jones, president of the Paradise Valley Fur Traders Association, is defrauded by his grandson Tim, who is hijacking furs in order to pay off a gambling debt.

Doc Buckland orders George Hooper's herd destroyed because of hoof-and-mouth disease, thus jeopardizing the impending sale of Hooper's ranch. Hooper's foreman murders the doctor and frames Dave Shelton, a mute who expresses himself through his paintings.

Dale's nephew Bob idolizes a dreadful gunfighter who is working as a front man for a gang of robbers.

Roy and his friends round up a gang headed by the sheriff's brother, who tries to steal an old prospector's savings.

Orphaned teenager Jerry King has fallen in with Colt Eggers and his outlaw gang who commission him to murder Roy. Gradually, Roy takes Jerry into his confidence and wins him over to the side of law and order.

Rod Miner, an incorrigible outlaw, returns to his native Mineral City, where his father runs the general store. He is soon pursued by Silver City Marshal Bill Culver, whom he bushwhacks before plotting a means to get rid of Roy.

There is a large reward for the capture of desperado Curt Carlson. A Young man sees the poster and decides to run away from his overbearing father to join the Carlson gang.

A bad-tempered, ex-champion prize fighter, King Keady, is hiding out after witnessing a murder, and Roy is assigned to guard him from mobster Max Marcella. Meanwhile, the boxer's eleven-year-old son runs away to see his estranged father, is captured by Marcella, and proves his bravery when he risks his life to save his father and Roy from the gangsters.

Roy befriends an ex-convict and gives him a job at the ranch. When several holdups occur, the convict is put in jail, although Roy suspects that someone else is impersonating him.

Roy and Dale are suspicious of a local school teacher's growing nervousness after the Paradise Valley stage is robbed.

Old-timer badman Denver Jones once hid $20.000 in stolen funds near Mineral City, and recent clues have given a gang of outlaws a head start in finding it. With Sheriff Blodgett away, Roy turns for help to former policeman Leo Driggs, who had lost his nerve and retired from the force, but whose fourteen-year-old son Petey believes his father can ""lick his weight in wildcats.""

Johnny Williams, son of a poor storekeeper, hopes to attend college, but his father cannot finance his education unless he joins his unscrupulous partner in a smuggling scheme.