A small town in California is attacked by Martians, beginning a worldwide invasion.

A New York City advertising executive goes on the run after being mistaken for a government agent by a group of foreign spies, and falls for a woman whose loyalties he begins to doubt.

After Regina Lampert falls for the dashing Peter Joshua on a skiing holiday in the French Alps, she discovers upon her return to Paris that her husband has been murdered. Soon, she and Peter are giving chase to three of her late husband's World War II cronies, Tex, Scobie and Gideon, who are after a quarter of a million dollars the quartet stole while behind enemy lines. But why does Peter keep changing his name?

Romance and suspense ensue in Paris as a woman is pursued by several men who want a fortune her murdered husband had stolen. Whom can she trust?