When her American lover visits London, a wealthy woman's jealous husband hatches a plan to murder her and inherit her fortune.

Ray Millandas Tony Wendice
Grace Kellyas Margot Wendice
Robert Cummingsas Mark Halliday
John Williamsas Chief Inspector Hubbard
Anthony Dawsonas Charles Swann
Patrick Allenas Detective Pearson
Robin Hughesas Police Sergeant O'Brien
Robert Burks