When Biff tries to help a young Polish boy recover his mother's diamond ring from a thief, he discovers a crooked ring of "gray marketeers" who prey on refugees in Marseilles.
The Bakers are invited to import some contemporary paintings, but they soon become aware that they are actually old masterpieces(including the Mona Lisa!) looted from great museums by the Nazis, now painted over to get them out of Europe by murderous art thieves.
While vacationing in the German Alps, Biff and Louise learn of a Nazi plan to counterfeit American money and try to find the missing plates that were used to print the twenty dollar bills.
While visiting Cairo, Biff is ordered to locate a stolen truck. With the help of a local guide, Biff not only discovers the truck, but uncovers a plot to overthrow the government.
A taut hostage drama in a remote seaside resort during the off season. A mobster turning witness against the syndicate is on the run and holds the Bakers and other guests hostage, knowing that among them is an assassin hired to kill him.
An old friend of the Bakers is accused of being a spy in French Algiers. Biff and Louise head to the Northern Africa territory to see is they can help their pal in clearing his reputation.
Biff heads to Pakistan to help locate a missing sacred idol. While there a case of plague breaks leaving Louise worried about her husband's health amidst an epidemic.
The Bakers find themselves in a predicament when they can't leave Turkey after martial law is declared. The couple must use ingenuity to get across the border.
