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

When Reese, Chad and Joe capture the Morgan gang it includes 14-year-old Grey Smoke. Joe helps him out and gets him hired as a runner for the Rangers. Reese is assigned to trackdown cattle rustlers, leaving only Chad, Joe and Parmalee left in Laredo. They notice that gunslingers are drifting into down, nine in all. They discover cattleman Stan Greevy is responsible for hiring them as he is upset about the cattle rustling. Parmalee is more concerned about the gunslingers starting a range war. Greevy goes to the saloon and tries to pay them off but the outlaws have noticed the lack of rangers and have decided to rob the town. Parmalee, Chad and Joe wait outside the saloon and a gunfight ensues. Grey Smoke knocks out one gunslinger at Ranger Headquarters and jumps on Jug Herriot from a rooftop when he gets the drop on Joe and Chad.

Reese is sent out to escort the Bordeaux sisters and gets his face slapped before finding out the sisters he's looking for are nuns. He escorts them to a settlement and makes them promise not to continue to Massacre Mission where priests were slaughtered some years earlier by hostile Comanches who are still on the warpath. The sisters telegraph Parmalee they have left for the mission anyway and the Captain sends Chad and Joe to protect them. They arrive to find the sisters smoking a peace pipe with the Comanches, who claim they have had nothing to do with the raids. Things are soon complicated by the arrival of outlaws who have treasure buried in the mission's sanctuary. They have been dressing like Comanches and committing the raids while using the mission as their hideout. Chad and Joe capture the gang with the help of the Comanches and each donates his share of the reward money to the mission.