Milo March, a tough private eye from Denver, is sent to Aragon City (which could be Hollywood) to help the City Betterment Committee wipe out the gangsters and hoodlums controlling brothels, bookies, gamblers, shady nightclubs, and the dope traffic. He just has to uncover "Mr. X," the mystery man who's been raking in a tidy little income by providing protection to the Syndicate. But can Milo accomplish that without stumbling over something even more...