A chemical manufacturer is killed just after asking detective James Wong to help him. So detective Wong decides to investigate this as well as two subsequent murders.

Jimmy joins Cannonball on a visit to the widow Fennamore, Cannonball's old girlfriend, at Firehole. Engineer Colton is killed by henchman Smoky Morgan and Philip Judson hides the body. The engineer, at the request of the widow's niece, Martha, had come to inspect a polluted reservoir. Land Company head Turner and Judson contaminated the water to get the ranchers to vacate so they can grab the land. Judson hires Easy to pose as the engineer, and he reports the reservoir useless but Jimmy's test proves the waters are not deeply polluted. Judson kills Easy to keep him from talking, and casts the blame on Cannonball. But Jimmy has a trick up his sleeve, right after the next song.

When Tasker kills Roy Rogers he takes one of his young sons. Fifteen years later the other son Roy arrives buying a ranch in the valley where Tasker now controls the water supply. Roy organizes the ranchers for a showdown with Tasker not knowing that his brother is Tasker's chief henchman.

When Moreland's henchman attack Bob Horner the Range Busters break it up. Horner dies but they get the baby Moreland was after. He must have it to become it's guardian and take control of the Horner ranch. When the henchmen catch up with Alibi, they take the baby cradle not realizing Alibi has substituted his dummy Elmer. Crash having evidence Moreland is the one they want, now has a plan to expose him.

Atkins is the boss of one of the Pony Express relay stations. He has been causing trouble and is replaced with Cal Sheridan. Atkins now gets the Richard brothers to raid one of the relay stations and they kill Norma's father. Cal sees that the horse of one of the raiders has a broken shoe and Norma sets out to find that horse.

A young mining engineer sets out to catch the killers of both his brother and a beautiful young girl's father.

In Song of the Wasteland, Jimmy tries to uphold law and order in a tough frontier town.

Jimmy finds a dying Ranger Braden who asks him to give his money belt to his sister. When he rides into town he finds another man claiming to be Ranger Braden. When the money belt is found in Jimmy's saddle bag, the fake Marshal tries to arrest him. But Jimmy escapes and hopes a telegram to Ranger headquarters will clear him.

As foreman of a dude ranch, Gene has two problems. One is a guest, the spoiled daughter of a millioniare, and the other is the disgruntled ex-foreman that Gene replaced, now just a ranch hand. Gene eventually gets the daughter straightened out but has to fire the ex-foreman and this leads to trouble when he returns intent on revenge.

Buck Peters arranges for Hoppy, California, Johnny and other cowboys to go to the aid of friends whose cattle are being rustled. Hoppy and California locate the rustlers' hideout and join the gang by posing as outlaws themselves, but must find a way to let the rest of the posse know where they are.