When a photograph is taken at the scene of a murder, the camera is tossed out of a castle window to destroy the evidence and lands in the back of a passing car belonging to chemist John Gray who becomes amateur sleuth after developing the film and goes in search of the woman captured by the photograph. When the camera is stolen from his laboratory, Gray's suspicions are further aroused.
Henry Kendall
as John Gray
Ida Lupino
as Mary Elton
Victor Stanley
as Albert Sims
John Mills
as Ernest Elton
George Merritt
as Police Detective
Felix Aylmer
as Coroner
Fred Groves
as Barnaby Rudd
Charles Paton
as Farmer
Tom Shenton
as Police Officer
Davina Whitehouse
as Amelia Wilkinson, the Maid
