The second of the three film versions of the E. Phillips Oppenheim espionage thriller set largely in an old dark house where a tremulous wife wonders if her husband is really his double, a dastardly German spy.

The story takes place on the Riviera, where the title character may or may not be involved in various shades of skullduggery, including murder.

Customs agents track a ring of arms smugglers into Hong Kong.

A young woman who works in the movie business buys a sweepstakes ticket that turns out to be a winner. Her stroke of luck changes her life around--and not necessarily for the better.