World War II espionage in Lisbon with Allied safe-crackers cultivating a master spy and his wife so they can steal Japanese codes that are keys to Axis battle plans.
A married couple is held hostage in a dismal, deserted town by three escaped convicts. The crooks are looking for a cache of stolen loot, and they intend to keep the couple alive long enough to locate and dig up the cash for them.
An aide at the American Embassy in London finds himself involved with both Scotland Yard and the French police over the kidnapping of the son of a Mafia boss who has spilled the beans back in the States.