Emily, an old girlfriend of Chad's, appears in Laredo with her father, a railroad tycoon. He offers Chad a $400 a month job, whether the romance between he and Emily works out or not. Reese and Joe try different schemes to bust up the romance but they backfire and Chad proposes to Emily and resigns from the Rangers. Reese and Joe are sent out to protect a wagon train from a possible Indian attack and they use it as one last ploy to keep Chad in Laredo. Reese rides back reporting that the train has been attacked but Chad doesn't believe him. Reese heads back and finds out the wagon train really is under attack, sending a rider back to Laredo. While waiting for the stage with Emily and her father Chad sees Parmalee with other Rangers leaving town and finds out Joe and Reese are in danger. He tells Emily he has to go and will catch up with the stage. She delivers an ultimatum that he must leave right away if he wants her. Chad tells her off, catches up with Parmalee, who reinstat

Chad sneaks into the barracks at night wearing only his underwear. Reese and Joe catch him and he explains he lost Billy Harker, the prisoner he was escorting. He gets a change of clothes, Reese's spare gun and a horse and heads back out. The next day Reese and Joe are sent out to catch the thief who stole the ranger horse, the only clue being Chad's muddy socks. They find Chad as he is wrestling with Laurie Martin, Harker's girl, a very convincing but deceptive young woman. She convinces Reese she was forced to help Harker out of fear and she leads him off to find Harker but knocks him out with a piece of wood instead. She is caught but tricks cattle drovers into thinking the rangers are outlaws and escapes during the ensuing fist fight and cattle stampede. Joe saw her escape but let her go saying if she thinks they aren't following she'll head right for Harker, which she does. The rangers track her to the outlaws hideout and capture or kill Harker and his gang in a shootout.

Chad and Joe set Ranger Jess Moran up for a 4th of July boxing match with Calvary champion Percy Flower, the bet being a month's pay. The Pryor Gang is in the territory and Captain Parmalee is worried about them hitting the next silver mine shipment so he cancels the holiday for the rangers and assigns six of them to be on duty in town while he waits at the mine with the rest of the rangers. Chad, Joe and Jess are three of the six left in town. The Captain has agreed that one of them may leave guarding the silver bars if all of them agree it's necessary. Their problem will be getting straight-laced Ranger Gruber out of the way. Insurance man Wilson Jones helps them do this. Once Chad, Joe and Jess leave for the boxing match the Pryor Gang strikes and steals the silver. Jess twists his ankle just before the fight and Joe has to face Flower. Chad and Joe leave to chase the Pryors and capture them and recover the silver while Jess takes a swing at Flower and knocks him out.

Hired gun Jab Harlan orchestrates an escape for outlaw Brad Scanlon so he can trail him and clear an innocent man of Scanlon's crime. In the process he tangles with Reese, foiling a capture attempt which brings him to Parmalee's attention. Scanlon, helped by his wife Lilah, pretends to be dead and soon is as he is ambushed by his partners to keep him quiet. Reese and Jab indulge in a little cat and mouse with each other after Scanlon's death. Reese, not knowing Scanlon's dead, locks Jab up until he can capture the outlaw. Jab sends Reese in the wrong direction and then picks the lock. Jab and Lilah ride out to the Garrett ranch to catch the rest of the gang. Reese returns to town and finds a note at the undertakers from Jab telling him to come to the ranch. He does and gets there just in time to help Jab in a gunfight with the outlaws and recover the money. Despite their disagreements Jab and Reese part friends.

Murders begin occurring the day Shamus McCloud arrives in town. At first the murder of Doctor Ingram's dog seems to be possible revenge by Shamus McCloud for the death of his brother at the doctor's hands. More murders take place and McCloud is blamed, the believed reason being he is taking revenge on the town too. The Rangers investigate other people who came to town the same day, such as Prof. Smythe and his traveling Museum of Horrors. One of the victims is a gambler that Joe owed money to so even he falls under suspicion. Shamus finally asks to be put in jail so he'll be cleared when the next murder happens. While he is playing cards with Chad and Joe in the jail the three of them figure out the killer is someone who can't tolerate high-pitched noise.

The rangers are investigating a series of bank robberies. They discover the robbers come in through the ceiling. Erik suspects a circus and joins it as a magician, romancing the lovely lady tiger tamer, Eve. Tolliver, the circus owner, uses an air balloon to transfer the money after the robbery. He then cases out the next bank to be robbed dressed as a wealthy gentleman and deposits their stolen funds into it. He also uses the circus performers, strongman, tightrope walker and acrobats, to carry off the robberies. Eve has second thoughts when she thinks Tolliver has murdered Erik. Erik figures things out and with the help of Joe and Eve, who saves his life, foils the last bank robbery. Erik takes Eve up in the balloon and drops a note to Chad and Reese stating all is well and, much to Chad's frustration, Eve sends her love.

Emerson Whitby III is a millionaire who travels to Laredo to participate in a marathon poker game with other millionaires including the beautiful Sabrina Lane. The Rangers stop an attempt to kidnap Whitby from the stage and discover Whitby and Reese have the same sounding voice. Since the kidnappers didn't see Whitby but only heard his voice the Rangers devise a plan to substitute Reese for Whitby in the poker game. The plan is to let Reese be kidnapped and then follow the gang to their hideout. Reese is captured but puts up too good a fight and Joe, hiding in a bush, has to knock Reese out with his gun butt so the kidnappers can subdue him. The switch is discovered and the real Whitby is spirited away in a trunk. The Rangers rescue him and catch the ringleader when the gang attempts to get the ransom money.

Captain Parmalee assigns Reese is to protect the rightful owner of the Willingham Ranch, which means evicting the Willinghams to make way for the railroad. The Willinghams are an eccentric but gracious and likable Southern family of artists who lost a son in the Civil War. Reese falls and ends up in bed with a sprained back. Parmalee sends Chad to check up on Reese. Chad arrives and sees two railroad surveyors pushing Mrs. Willingham around and promptly decks them. He and Reese agree to find a nice way of getting the Willinghams to leave. Joe is sent next and walks in on Reese, Chad and the Willinghams singing Swanee River. They discover that brother Alcott signed the bill of sale but had no ownership right to the property. All they have to do is find the waiver he signed stating so. Joe is persuaded to pose for a sculpture and after Erik arrives he's soon reading Shakespeare. The four rangers search for the waiver with the Willinghams as railroad toughs approach the ranch de