The Bag of Diamonds

A fog-bound London scene opens with a policeman encountering three men bearing a limp, intoxicated young man to a surgeon, establishing a mood of secrecy and suspicion. The narrative centers on Mark Heath, who, newly recovered from a dangerous episode, refuses his sister Janet’s repeated pleas to investigate the shadowy night that brought him to the city. The story follows their uneasy choices, the suspicious characters and clandestine movements through the streets, and the gradual exposure of a criminal mystery involving hidden valuables and the consequences of past wrongdoing.