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 is chemist "John Gray" who discovers a mysterious camera in the back of his car. When he develops the film, he finds a photo showing a gruesome murder scene alongside those of a woman whom he determines to trace. What ensues now is a romantic, gently comedic, thriller with a couple of decent performances including an engaging few coroners court scenes with the accused John Mills and Felix Aylmer (the coroner). It also features (fleetingly) Ida Lupino as Mills' well meaning wife. Kendall made his name on the stage, and his performance here is a bit over-egged; indeed it takes a bit of getting used to - but it's just about worth it. The ending has shades of a farce about it, which is a shame but hardly a surprise. Edited by David Lean, no less - and the photography and pace keep this moving along quite well, and funnily. Not a great film, but an enjoyable enough B-feature.