
Celebrated crime writer Colin Knowles finds himself at the centre of a baffling real-life mystery when his estranged wife Louie asks for his help. Her new boss has gone missing at his grand country home -- and when his body is found, the hunt is on for a devious and twisted murderer. Sinister letters from London refer to a 'double crime'. Who will be the killer's next victim?

as Mrs. Durant

as Louie Knowles

as Colin Knowles

as Supt. Simmons

as Whistler Grant

as Sergeant Bassett

as Carrington-Phelps

as Tony Barlow

as Mrs. O'Connor

as Andrea Durant

as Gwen - The Housekeeper

as Joe Tutt

as Joe - Cloakroom Attendant (uncredited)

as Police Constable (uncredited)