An old school friend of Annie's breaks out of jail with two other inmates to go search for the treasure at the mission. She believed his innocence when he was convicted, and still believes him. Now she must help him capture the two inmates who want the treasure.
While awaiting word from the mine to see if they found gold, Annie discovers a beloved stagecoach is now being driven by a woman, the daughter of the owner who is now threatening to sell the stage and pocket the money. Annie suspects there's more going on with the mine when they return and announce that there is no gold. Now, she must get to the bottom of things before it's too late for the town.
Annie and Lofty jail Dobie but he proclaims his innocence while they look for the rest of the gang. Dobie escapes but he and Tagg get kidnapped by the actual culprits, leading Annie to take desperate measures to rescue her brother.
Sam Forbes is murdered and his foreman Choctaw looks to inherit his ranch when a previously unknown niece Elaine appears. Annie is suspicious but the men fall for her delicate ways. But it's all an act and Tag's archery skills play a part in saving the day.
Vic Carver, released from prison, arrives with his brother Johnny to get revenge on Annie's Uncle Luke. Annie gets her uncle out of town and tries to reason with the Carvers. She succeeds with Johnny but Vic kidnaps Tagg.
Annie is in charge of the sheriff's office and is being bothered by braggart Chet Sterling's antics. His uncle Frank's bank is robbbed and Tagg names one bandit as Trem, Frank's friend, after he secretly trails them. A double cross, killing, and frame up follow.
Legendary lawman Clay Griffin is losing his eyesight and refuses an operation despite Annie's pleading. Johnny Storm and the Murdocks commit robbery which leads to Clay's brother Frank being shot. Annie and Lofty accompany Clay when he calls Johnny out.
Les Clinton, alias Texas Sandman, comes to Diablo ready to retire from gunfighting and marry local teacher Marge. He befriends Annie who aids him when the Yanceys arrive seeking revenge against the weaponless Clinton.
Annie and Tagg return from raising money for charity with a circus sideshow when they are robbed by someone calling himself the Welshman. Annie recovers part of the money, then she and Lofty lay a trap with one last performance.
Duke and his gang frame Sam plus kidnap Linda to keep him from proving his innocence. Annie and Lofty must stop a lynch mob lead by Howard, save Linda while proving Duke's guilt with Tagg's ventriloquism helping.