Burglar Nat Harbin and his two associates set their sights on wealthy spiritualist Sister Sarah, who has inherited a fortune -- including a renowned emerald necklace -- from a Philadelphia financier. Using Nat's female ward, Gladden, to pose as an admirer and case the mansion where the woman lives, they set up a perfect break-in. Things get complicated afterwards.

Dan Duryea
as Nat Harbin

Jayne Mansfield
as Gladden

Martha Vickers
as Della

Peter Capell
as Baylock

Mickey Shaughnessy
as Dohmer

Wendell K. Phillips
as Police Captain

Phoebe Mackay
as Sister Sara

Stewart Bradley
as Charlie

John Facenda
as News Commentator

Sam Elber
as Person