General store owner Judy is fed up the crime in her county such as bank robbery and an illegal crooked gambling den that fleeces her two prospector friends. Taking after her grandmother, a western sheriff known as "Oklahoma Annie" to all, Judy manages to persuade new sheriff Dan Fraser to deputize her. After she helps capture bank robber Curt Walker, who's in cahoots with county supervisor Haskell, the sheriff feels confident enough in Judy to leave her in charge by herself while he rides to get the judge for Walker's trial.
Things instantly go wrong for Judy, whose shooting skills are so ineffective that she attempts to use fireworks instead. Walker gets away and Dan ends up in grave danger, but with all the men gone in a posse, Judy rounds up other women in town and together they ride to Dan's rescue in the guise of a volunteer fire department. After his rescue, Dan decides to take the county supervisor's job and appoints Judy as the new sheriff.
