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.
A pair of friends robs from a jewelry shop, and buries their loot in a field out in the country before they get caught. They spend ten years in prison, and when they're let out they go back to the burial ground, only to find out that it's no longer a bucolic pasture but the site of a large department store. Despite that setback, they're still determined to dig up their stash.
The heir to a London department store must learn the business by working his way through various menial jobs incognito first. However, a crooked manager has arranged for a cracksman, just out of prison, to join the staff. Each is mistaken for the other.
