Based upon a review in a film magazine, Jimmy Valentine, a prisoner in Sing Sing for safe-cracking, although guilty, maintains his innocence. When he obtains a pardon, he goes straight, influenced by a beautiful girl. He assumes a new identity as Lee Randall and diligently works at a bank for three years.
In the border town of Hernandez, New Mexico, undercover agent Mark Owens (Charles Quigley) is assigned to help the United States Border Patrol break up a well-organized band of smugglers. Hernandez also has a reputation for "quick marriages", just across the border in Mexico, so Mark soon signs on as a pilot on "The Honeymoon Express." "Hot Cake Joe" (Herbert Heywood), who runs a sandwich stand, is an informant for the smugglers and recognizes Mark is a "G-Man". Reporter Nancy Rawlings (Rosalind Keith), looking for a good story, wants to feature Mark as the pilot of the marriage service, but he is very reluctant to be photographed.
A Los Angeles reporter and his photographer wife investigate a criminal gang rustling cattle and trying to establish a cartel over beef supplies to the city's butcher shops.
U.S. Customs Service special inspector Tom Evans works with the British Columbia Provincial Police on an assignment to capture a gang smuggling furs from Canada into the United States.
A promiscuous wife prefers a love affair with her cousin to caring for her sick husband, while also fighting off the advances of her lust crazed brother-in-law. When her husband is found poisoned to death, she is suspect No.1 for his murder.
Detective Duke Martindel and his wife Phyllis work together to clear a girl falsely convicted of having murdered a judge. The case goes stale when two people who knew the truth are murdered. Duke and Phyllis then become prisoners of the real murderers, and the case is solved.
Kent Taylor plays a man who meets a dancer in a nightclub. She's implicated in a killing, and he's drawn into escaping from the police with her through Chinatown as they seek the real murderer.
In London, a young woman plummets four floors to her death into the hallway of an apartment building also occupied by Superintendent Blake, a police officer. Initially deemed a suicide, Blake suspects foul play but soon finds himself removed from the case. Notwithstanding, he calmly continues to investigate in an unofficial capacity, searching for clues and interviewing persons of interest.
Sach is punched in the nose by Herbie, a local kid who the boys know, and acquires the ability to read people's minds. Slip sees this as an opportunity to buy a detective agency, and their first client is a beautiful blonde who is trying to escape from her connections with mobsters. She leaves behind a stolen mink coat and an envelope that would incriminate the mobsters.
Unemployed actor Steve gets a job with Miss Kennedy's agency as an escort-bodyguard, but ends up being framed for murder after a wealthy client, Miss Elizabeth Quinn, is killed.
Jacob Van Eeden is a financer who has recently committed a forgery. He is secretly in love with his secretary Marion Slade, although she is engaged to Peter Bradley. Peter discovers the forgery and Van Eeden throws Peter overboard.
Two NYPD detectives, Christopher Perez (Christopher Iengo) and his partner Steve Clarkson (Adam Piacente), take on Peskin (Aaron Katter), a vicious drug lord.
Johnny Adams goes to prison, under a false name, with the intention of killing the sadistic Captain White, a bastard guard, who had beaten Johnny's father to death just before the end of his sentence. Not knowing Johnny's true identity, White asks him to spy on his cellmate "Blackie" Drew, but Johnny and Blackie develop a mutual respect for one another. Rev.
Framed for murder, heavyweight boxer Terry Williams is sent to prison, but he is released after several years on good behavior. He becomes a championship contender and on the eve of the big fight, finds the man who can prove that he was framed for the crime for which he served time.
Detective Chick Carter (Lyle Talbot) finds himself in a complex case when Sherry Martin (Julie Gibson), a singer at the Century Club, reports the robbery of the famous Blue Diamond, owned by Joe Carney (Charles King), the owner of the nightclub. Joe planned the theft in order to pay a debt to Nick Pollo (George Meeker) with the $100,000 insurance money he would collect. Sherry double-crossed Joe by wearing an imitation one, while she threw the real one, hidden in a cotton snowball, to Nick during the floor show.
Industrial chemist Roger Drummond invents a new formula for paint. In short-term need of money, he borrows some cash from a handbag he finds, and later returns the money, but in then meantime a valuable necklace has been stolen from the bag by a thief, and Drummond is charged with the theft by the bags's owner, Marion Ashley, niece of his employer. Drummond is found guilty and is sent to prison, and in his absence his colleague George Marston steals the paint formula.
A womanizing matinée idol is found strangled in his dressing room. The door is locked from the inside and there is no other way into the room. He had been having an affair with his leading lady, while his actress wife is doing the same with the stage manager.