Whitney Cameron is in a quandary: he's attracted to his beautiful sister-in-law, Lynn, but also harbors serious suspicions about her. Her husband, Cameron's brother, died under mysterious circumstances, and now that the death of her stepchild, Polly, has been attributed to poisoning, he suspects that Lynn is after his late brother's estate, and killing everyone in her way.
Joseph Cotten
as Whitney 'Cam' Cameron
Jean Peters
as Lynn Cameron
Gary Merrill
as Fred Sargent
Catherine McLeod
as Maggie Sargent
Jack Kruschen
as Detective Lieutenant Harold Y. Cole
Barney Phillips
as Detective Captain Pringle
Freddy Ridgeway
as Doug Cameron
Harry Carter
as Wheeler (Uncredited)
James Gonzalez
as Joe Cunningham (Uncredited)
Ed Hinton
as Ed (Uncredited)
Jonathan Hole
as Dr. Stevenson (Uncredited)
Mae Marsh
as Anna Swenson (Uncredited)
