Robert Wagner plays an American who owns a Lisbon nightclub and Teri Garr is a slightly dippy chanteuse who has stumbled across a Nazi plot to kidnap the Duke and Duchess of Windsor, living at the time (1942) in Portugal.

The wives of three wealthy men are kidnapped and held for a $3 million ransom, but one of the men doesn't want to pay his share.

An investment counselor turns jewel thief when the gangster he embezzled funds from demands to be paid back.

Following a triple professional hit a U.S. agent, Paul Sherman, arrives in Amsterdam to investigate a heroin smuggling ring. He finds a city rife with drugs and a police force unable or unwilling to do much about it. With his incognito female fellow agent, Maggie, the American is soon stirring things up.