Jim Ackland, who suffers from a head injury sustained in a bus crash, is the chief suspect in a murder hunt, when a girl that he has just met is found dead on the local common, and he has no alibi for the time she was killed.
John Mills
as Jim Ackland
Joan Greenwood
as Jenny Carden
Edward Chapman
as Mr. Peachy
Kay Walsh
as Molly Newman
Joyce Carey
as Mrs. Vinton
Catherine Lacey
as Miss Selby
Adrianne Allen
as Joyce Carden
Felix Aylmer
as Dr. Martin
Frederick Piper
as Det. Insp. Godby
John Boxer
as Det. Sgt. Troth
Patrick Holt
as Harry Carden
George Benson
as Mr. Pope