Rex O’Herlihan, the “Singing Cowboy,” and his “Wonder Horse,” Wildfire, engage in a gunfight with a gang of thieves who attempt to rob a stagecoach. Rex suffers an injury, and nurses his wounds by campfire, singing a cowboy tune. Sometime later, he rides into the town of Oakwood Estates, enters a saloon, and meets Peter, the self-described “town drunk,” who gives Rex the lay of the land. A group of “bad guys” arrive, led by Blackie, and shoot up the place. Peter tells Rex they work for wealthy landowner Colonel Ticonderoga. When Blackie insults saloon girl Miss Tracy, Rex jumps to her defense, and shoots Blackie’s gun from his hand. Blackie’s clumsy sidekicks, Jim and Jud, accidentally shoot him from behind, killing Blackie. They blame Rex for his death, and vow revenge. Rex tells Peter that all Western towns are exactly the same, and returns to his campsite outside of town. Jim and Jud bring Blackie’s body back to “Rancho Ticonderoga,” and wrongfully blame Rex for his death. Colonel Ticonderoga orders Rex’s murder. The Colonel’s daughter arrives, and mourns the loss of her lover, Blackie. Under the cover of darkness, Jim, Jud, and their gang approach Rex at his campsite. Rex shoots the five inept men in their hands, and the gang returns to the Colonel, asking him to recruit “the railroad men” to beat Rex. The Colonel reluctantly agrees, and meets with the “Railroad Colonel” on a moving train, seeking his assistance. The Railroad Colonel agrees. However, Rex makes a surprise attack on the train, and none of the men can shoot Rex even though he stands still before them. Rex retaliates by shooting each of them in the hand. Sometime later, Miss Tracy asks Peter where to find Rex, expressing her desire for the singing cowboy. Meanwhile, Colonel Ticonderoga’s daughter is dragged behind her runaway horse, Wildfire, and Rex comes to her rescue. He marvels at the coincidence that both of their horses have the same name. Rex tells the young woman to hide as someone approaches. Miss Tracy arrives to seduce Rex, but he rejects her, claiming to be a “good guy.” As someone else approaches, he tells Tracy to hide. Rex juggles the two women, hiding them from each other, as Peter, the town drunk, appears at his campsite, asking to be Rex’s sidekick. Rex turns Peter down, but after sheepherders arrive and ask Rex to avenge their son’s murder by Colonel Ticonderoga’s gang, Rex relents and allows Peter to be his sidekick. Sometime later, Rex and Peter meet Ticonderoga and the Railroad Colonel’s combined gang for a shootout, and Rex admits they are outnumbered. He distracts his rivals by performing a dance with his horse, Wildfire. After the trick riding, Rex and Peter flee. Rex continues to outsmart his enemies, and the two Colonels plot their next move, hiring a gunman named Bob Barber. In time, Rex becomes inexplicably melancholy, and tells Peter he prefers to be alone. Rex worries, as he watches Barber’s approach from the cliffs above. The next day, the men face-off at the saloon, and Bob Barber introduces himself as “Wrangler” Bob Barber. The men compare wardrobes, and realize they are both “good guys.” After discussing the qualities of a “good guy,” Rex’s confidence is shaken, and he postpones the fight. The townsfolk run him out of town, calling him a coward. Rex later confesses to Peter that he has never slept with a woman, which is the source of his insecurity. He throws away his guns and gives up being a cowboy. Colonel Ticonderoga incites Rex to fight by sending Jim and Jud to shoot Peter. Rex again dons his cowboy gear, and recruits the sheepherders as backup. They ride into the center of town to face Bob Barber and Ticonderoga’s gang. Peter appears, revealing a bulletproof vest given to him by Rex. Bob Barber protests the dirty fighting, but Colonel Ticonderoga fires the first shot, and the gunfight begins. Rex, Bob, and Peter remain unharmed, despite standing in the middle of the battle without firing a shot. The Colonels’ men shoot each other and are all killed. Rex challenges Barber to a duel, and when he is actually shot, he asserts that Bob is, in fact, not a good guy. Before collapsing, Rex shoots Barber in the head, killing him. Colonel Ticonderoga apologizes to Rex, and invites the townsfolk to his ranch for a party. Rex arrives with his arm in a sling, and tells Peter he is leaving town. Peter pleads to go with him, but Rex prefers to travel solo. Before riding off into the sunset, Rex kisses Miss Tracy goodbye, and hints to Peter that he has been intimate with her. Peter ignores Rex’s protest, and follows after him.