US government is advised to hire a real thief, Alexander Mundy, in order to nab the crooks who have killed several agents and eluded law for years.
In Italy, Al goes undercover with an egotistical opera singer to break into an impenetrable safe and get the goods on a former Nazi war criminal.
Al goes undercover as a magician in a small foreign country to find the proof that Premier Paz is bribing a U.S. Congressman for foreign aid, but his cover is soon blown.
To retrieve an experimental fuel sample, Al stages a fake diamond robbery to wrangle an invitation to the estate of Nick Grobbo, the man who plans to sell the stolen sample to the highest bidder.
Al poses as a mixologist to get close to Kristoff, a Communist guerrilla who plans to overthrow the government of Santa Thomas. An international cartel is secretly backing Kristoff, and the document that incriminates them is locked in a safe sealed with six electronic keys that are hidden by the six cartel members at the estate where Al will be "performing."
A millionaire blackmails Al into stealing fifty atomic fuel capsules for him. If Al fails, the villain will expose the thief's relationship with the SIA, forcing the agency to send him back to jail.
Colonel Heinrich sets up a Western double-agent, Schiller, and Al must get himself arrested by Heinrich, break out of an East German security headquarters, and get to Schiller's safe to recover important documents... with no one the wiser.
Having put the documents in Colonel Heinrich's safe, Al figures that he's clear... until Noah says that now Al has to steal them out of the safe.
Al has to crash a foreign film festival to steal the only copy of a premiere movie, The Red Turnips. The director has inadvertently captured a major SIA operation on film in the background, and Al has to get the film before enemy agents obtain it and try to identify the compromised agents.
Noah sends Al to Rome to recover a stolen treaty from Nick Grobbo, a fence that Al has dealt with before. To cover the theft, set to take place at a doctor convention, Al steals a rare diamond to get into Nick's good graces.
Noah sends Alexander in to stop a cartel's purchase of a munitions company. If they make the purchase, they'll be able to control arms deals worldwide. To steal the stock proxies, Al must get into a sealed vault exposed to the public at all times.
Al's old friend Chak, the chief of intelligence of an emerging African country, San Zambotiko, asks the thief to recover stolen tribal scrolls. If the aging president discovers the theft, the shock will kill him, paving the way for a takeover by Red Chinese agents who engineered the theft.
Al is arrested by a retiring inspector, who has connected Al to four jewelry thefts. The thief soon realizes that the inspector set him up, and plays a dangerous double-game to get him to expose himself.
To identify Daniel Ryder, a reclusive billionaire who they think may have been replaced by an impostor, Al has to identify him by getting a photograph of an identifying scar on his body.
When Al is injured during a mission, he's forced to bring in a replacement, the second-best thief in the world, Pepe Rouchet. Al guides Pepe in to steal the Crown Jewels of La Monica, taken by an insider and hidden at a heavily-guarded estate. However, Pepe goes in on his own, unaware of a major trap, and Al has to lend a hand.
The ladies, participating in a beauty pageant, pay a visit to the Pentagon. During the tour, a top secret document is stolen. An agent, who has been tagging the beauty queens, is found dying and gasping a cypher "38-23-36. Mundy investigates the ladies.
Alexander Mundy, desperately trying to rescue a kidnapped girl, turns for help to the king of Rome's petty crooks.
Al Mundy matches wits with a mad scientist aboard a plane to a scientific meeting in Melbourne.