Set in modern times, Stony Brooke's kid brother George rides into town saying that he is wanted for murder, a charge he denies. Stony, Tucson and Alibi ride to his brother's town to see that the Brooke family cattle ranch is up for sale due to George being already found guilty of murder. They discover the town is run by a group of sheepmen who wear uniforms. The Mesquiteers decide to run Tucson as a candidate in the election for sheriff to guarantee a fair trial for George. The corrupt sheepmen try to deny the cattlemen the right to vote, but the Mesquiteers bring everyone to justice using blazing six-guns, dynamite and ventriloquism.
