When a British army officer, Harry Faversham, resigns his commission on the eve of his regiment's departure for service in the Sudan he is sent four white feathers of cowardice by his comrades and fiancee. In an attempt to redeem himself, Faversham travels out to the Sudan where he saves the lives of his former comrades.
A superior-minded British aristocrat condescends to visit Holmes for help with a spot of bother: his new wife has disappeared. What is the secret of her past? How will the solution affect the haughty "lord?"
A frightened woman is murdered in the London apartment of a well-known novelist named Henry Leroux. The police arrest Leroux's butler, but he escapes and runs off to a mysterious opium den, the lair of a drug dealer named Mister King. Gaston Max, a detective from Paris, arrives in London to investigate the drug trafficking. Although the police take down the gang, Mr. King escapes and manages to keep his true identity a secret.
