Heyes and Curry gain passage on a train that is full of Bannerman detectives who are setting a trap for them and their gang

After an embezzling banker / murderer sets up Curry and Heyes to take the fall for his crimes, the boys try to clear themselves by playing on his greed with a salted diamond field.

While Curry drives a wagonload of dynamite across rugged country, Heyes hires on as a guide for two Englishmen searching for a tribe of giant redheaded Indians rumored to have lived in the area of Devil's Hole.

Smith and Jones balance a Mexican bandit and pretty saloon owner while they gather a herd of wild cattle as a cover for other activities.

A saloon entertainer and a special agent suspect that Heyes and Curry's interest in a condemned robber is the same as their own; a rumored fortune in stolen buried gold.

Curry and Heyes try to avoid a sheriff who is sure to recognize them.

The passengers of a coach are taken hostage at Diablo Station by four cowboys. Not discussing their ultimate goal, they keep Heyes and the Kid and the others tied up, just waiting.

Soon, the goal becomes very clear to Heyes. The leader wants to avenge his brother's death - upon sheriff Lom Trevors. Can Heyes and the Kid, or any of the other passengers warn Lom before he arrives?

The boys accept the offer of a vacation - but doesn't realize that the activities during this vacation involves catching and taming wild horses.

They and their friend, Bronc, check into a boarding house near where the horses are, and meet some people whose coach has broken down. Among them is Beegee, a woman on the look-out for a husband, and who takes a good look at both Heyes and the Kid. And then there's the very religious man with a sister who has a crush on the Kid.

But the boys must also battle wits with a ranch owner who thinks that the horses walk on his land. Prhaps the only solution is to shoot him to stop him from stealing ""their"" horses?