When crime boss Big Mike Morgan is killed, his lieutenant, "Doc" Rogers, learns that Morgan has a son named Edward living in the country with his mother. Rogers has naïve Edward brought to the city and installs him as the head of Acme Protective Agency. Good-hearted Eddy assumes his company provides insurance, rather than extortion-- But don't be too hard on the guy, he still doesn't know he's Baby Face Morgan, the most feared gangster in the city!
While an escaped convict, Moose Malloy, goes in search of his ex-girlfriend Velma, police inspector Michael O'Hara attempts to track him assuming him to be a prime suspect for a number of mishaps.
Conniving Broadway starlet Mida King has plenty of enemies, so when she's found murdered at Grand Central Station, Inspector Gunther calls together a slew of suspects for questioning. Mida's shady ex-flame, Turk, seems the most likely culprit, but when smart-mouthed private eye Rocky Custer -- also a suspect himself -- begins to piece together the crime, a few clues that Gunther has overlooked come to light.
Sadistic killer-for-hire Philip Raven becomes enraged when his latest job is paid off in marked bills. Vowing to track down his double-crossing boss, nightclub executive Gates, Raven sits beside Gates' lovely new employee, Ellen, on a train out of town. Although Ellen is engaged to marry the police lieutenant who's hunting down Raven, she decides to try and set the misguided hit man straight as he hides from the cops and plots his revenge.
An actress gets involved with a criminal gang and winds up taking the rap for a $40,000 bank robbery. Before being sent to prison, she steals the money from her partners and hides it, thinking to use it as a bargaining chip to be released from prison. However, her former partners have different ideas.
A New York radio personality travels to the small town of Fernville to oversee a contest to identify retired safecracker Jimmy Valentine, believed to be living there under an assumed name. The close-knit town of upstanding citizens is understandably upset by this venture, all the moreso when some of its citizens begin to be murdered. The radio personality and the local newspaper's young daughter collaborate on solving the murders while revealing Valentine, who has become one of the suspects.
The police arrest a man climbing over the wall of a cemetery after midnight. He claims that he is being blackmailed and is following instructions he received by mail to leave $1000 on a certain grave. It turns out that he's not the only one who got a blackmail letter from the same person--calling himself "The Black Panther"--and it also turns out that all the recipients are connected to an opera company.
A group of academics have spent years shut up in a house working on the definitive encyclopedia. When one of them discovers that his entry on slang is hopelessly outdated, he ventures into the wide world to learn about the evolving language. Here he meets Sugarpuss O’Shea, a nightclub singer, who’s on top of all the slang—and, it just so happens, needs a place to stay.
A struggling band find themselves attached to a fugitive and drawn into a series of old feuds and love affairs, as they try to stay together and find musical success.
A pair of nightclub owners run a string of escort bureaus where men pay for the "companionship" of young women. The district attorney sends an undercover agent to infiltrate the bureaus.
Dr. Ralph Snyder and Dr. Frank Blake open an office together but soon split over a rivalry for nightclub singer Diana Wayne and a difference over ethics.