Dutch painter Jan-Van Rooyer hurries to keep a rendezvous with Jacqueline Cousteau, an elegant, sophisticated Frenchwoman, slightly his elder, whose relationship with him had turned from art student into one of love trysts. He arrives and is confronted by Detective Police Inspector Morgan who accuses him of having murdered Jacqueline. Morgan listens sceptically to the dazed denials of Van Rooyer as he tells the story of his relationship with the murdered woman. Morgan, after hearing the story, realizes that the mystery has deepened, and it becomes more complicated when the Assistant Commissioner, Sir Brian Lewis, explains that Jacqueline was not married but was being kept by Sir Howard Fenton, a high-ranking diplomat whose names must be kept out of the case.
Hardy Krüger
as Jan-Van Rooyer
Stanley Baker
as Insp. Morgan
Micheline Presle
as Jacqueline Cousteau
John Van Eyssen
as Insp. Westover
Gordon Jackson
as Sergeant
Robert Flemyng
as Sir Brian Lewis
Jack MacGowran
as Postman
Redmond Phillips
as Police doctor
George Roubicek
as Police constable
Lee Montague
as Sgt. Farrow
