Set in Prohibition era Chicago, bootlegger Robbo and his cronies refuse to pay the greedy Guy Gisborne a cut of their profits after Guy shoots mob boss Big Jim and takes over. When Big Jim's daughter, Marian, gives Robbo a large sum, believing he has avenged her father's death, the gangster donates to an orphanage, cementing his reputation as a softhearted hood.
When an experimental flying saucer crashes, secret agent Matt Helm has to bring back the secret weapons hidden on board.
When Count Contini attempts to destroy the world's economy by masterminding the theft of $1 billion in U.S. gold, ICE chief MacDonald summons secret agent Matt Helm to stop him.
Julian Berniers returns from Illinois with his young bride Lily Prine to the family in New Orleans. His spinster sisters Carrie and Anna welcome the couple, who arrive with expensive gifts. The sisters hope Julian will help with their expenses, and he tells them that while his profitable factory went out of business, he did manage to save money. It turns out that Julian pulled off a real estate scam and took off with the money. Carrie is obsessed with her brother. Her jealousy of Lily pushes her to discover the shady land deal for herself and she does everything she can to wreck their marriage.
The handsome top agent Matt dies a tragic death in his bath tub - the women mourn about the loss. However it's just faked for his latest top-secret mission: He shall find Dr. Solaris, inventor of the Helium laser beam, powerful enough to destroy a whole continent. It seems Dr. Solaris has been kidnapped by a criminal organization. The trace leads to the Cote D'Azur.
Mike, Chip, and Larry are three lusty, brawling U. S. Cavalry sergeants stationed in Indian Territory in 1870.
Matt Helm is called out of retirement to stop the evil Big O organization who plan to explode an atomic bomb over Alamagordo, NM, and start WW III.
