When Prohibition ends, the mobsters move into the "protection" racket; those who do not pay are knocked off. Small-town reporter Ruth wants a job at the big-city paper, but the editor will not hire her, so she looks for a story and sees the murder of Liquor Board Commissioner Eldridge. After she gets the job, she gets the picture of the killer who knocks off Murty, the driver who knocked over Eldridge. Ruth is in the thick of the investigation and one step ahead of Casey.