Silver City is attempting to persuade the state's election convention to be held there and showing off the new electric power line being built into the town. During the construction, and the convention representatives visit, a body is found which leads back to the saloon. Tom, a boy in town, wants Amy, Katie's little sister, to go to Denver with him for the weekend where he is going on business. Katie, of course, doesn't want her 15-year-old sister going off alone with a boy. Marshal Stone and Det. Finch are hard-pressed to solve the murder quickly, so Mayor Smith doesn't lose the chance to have the convention in Silver City.