Mike Gilbert is doing time at San Quentin prison in California. His sentence doesn't have long to go, but when fellow convict Roy Gruber plans a breakout and wants pilot Gilbert to help steal a plane and fly them out of the country, splitting $120,000 in stolen money Gruber has hidden, Gilbert goes along, having heard his wife Georgie wants a divorce. During their escape, inmate Hap Graham tries to tag along.
John Forrest is a top investigator for the Stamford Insurance Company. Retiring from the firm, he intends to devote the rest of his life to writing detective fiction, but his plan is foiled when his former employers are robbed of $1,000,000 in jewels belonging to foreign potentate Prince Homouska. With the help of his befuddled butler Treadwell, Forrest follows the trail of clues to American gangster boss Chadwick, capturing his quarry with a variety of slapstick subterfuges.
American insurance investigator Jimmy Baxter works for the Anglo American Investigation Company in England. He searches for a gang of jewel robbers who use gelignite as part of their modus operandi. He goes to The Green Dragon Club to interview its owner Mr Popoulos.
Gary Corbett kills a pair of claim jumpers who did likewise to his father. He is charged with murder, but cannot be taken to Juneau to stand trial until the weather permits. Marshal John Masters keeps him in town until the prisoner can be moved.
Burglars Molly Brian and Joe Hagney break into the Vickers mansion on Long Island and loot the safe but are caught in the act by another crook, Jerry Winters, who takes the money from them. The three are confronted by Pious Joe McDowell and his wife Mamie, also crooks, but who assert themselves as friends of the Vickers family. Molly, Joe, and Jerry introduce themselves in turn as Vickers' household servants.
Tom Lawrence, aka the Falcon, helps Dolores Ybarra enter an art gallery late at night to supposedly recover a painting that belongs to her. The Falcon discovers that the woman is the model for the artist's painting. However, the artist, Humphrey Wade has been dead for 15 years.
In the small upstate New York town of Cornwall, Vivian Osborne is dallying with Jud Brooks. Vivian, young and saucy, is married to an elderly but adoring banker, whose business is in far off New York City. Brooks is an up-and-coming teller at the local bank, upon which the town's giant factory and financial stability depend.
Mortimer Thompson and Steve Craig are a pair of sidewalk confidence men working Broadway one step ahead of the police selling phony watches. Broke, they arrange to have dinner with Gibbs, an old friend, thinking that he will help them with some money. However, Gibbs is broke as well and thinks that Steve and Mortimer can help him.
In 1947, Inspector Garvey of Scotland Yard suspects Michael Lanyard, the reformed jewel thief known as the "Lone Wolf," is behind the theft of the priceless diamonds called the "Eyes of the Nile". Lanyard denies any involvement claiming that he is in London with his butler, Claudius Jamison to write a book on the jewels and was in New York when they were stolen. Lanyard and Jamison are short of funds and when Ann Kelmscott, the daughter of wealthy gem collector Sir John Kelmscott, invites them to the family estate, they agree.
The criminal mastermind "the Frog" gives his orders to his numerous gang through a speaker in a large statue of a frog. The manager of the Southwestern Bank, the target for that night, is dining with a beautiful young lady named Lela Oaks. After the successful robbery, the Frog tells his men that he is planning a big job, one which will enable them all to retire.
Set in the late 1960s, the story revolves around three main characters: Edward, a banker, and two of his children: Megan and Tom. Megan Cartwright is 21 and has never left her family but then moves to London and discovers her full potential. Meanwhile, her older brother, Tom, struggles to process the suicide of his close friend.
Following the Second World War, two former soldiers who are friends go their separate ways; one joins the Metropolitan Police while the other becomes a racketeer in post-war London.
A police chief's daughter, in home security sales, contacts an art gallery possessor. They love art and despise their clients' motives for gathering artworks. They think of a plot to steal overlooked but valuable artworks from her affluent clients' homes.
Horse racing jockey Wally Sanders loses a race, crashes his car, and a claim is made on his insurance. Jim Matthews, a shrewd insurance investigator, follows up the company's suspicion of foul play and finds himself deep in a web of gambling and corruption surrounding the racetrack.
Johnny Holiday (Allen Martin Jr) is a fatherless boy whose mother (Greta Granstedt) is ill in hospital. He hero-worships the psychopathic teenager Eddie Duggan (Stanley Clements). Protecting the thieving Duggan, Johnny is sent to a reformatory in Indiana, where he is taken under the wing of Sgt Walker (William Bendix), the bluff but kindly man in charge of the school farm.
Street gangsters Armand and Marie are madly in love, and she persuades Armand and other gang members to rob the home of Pierre Marcel, a wealthy scientist. The police break up the robbery but Pierre hides Armand from them because he kept a gang member from stabbing him, but Armand is wounded in doing so. As Armand regains his health, Pierre sets him up with the beautiful Jean D'Arcy, and Armand has no objections.