The Adventure of the Bruce-Partington Plans

"The Adventure of the Bruce-Partington Plans" is a short story by Arthur Conan Doyle, featuring his fictional detective Sherlock Holmes. It is one of two stories that feature Holmes's brother Mycroft, the other being "The Adventure of the Greek Interpreter".

Spoiler warning: Plot or ending details follow.

In the story, the London Underground plays a prominent part. State secrets have been stolen, and the body of the young suspect is found beside the tracks of the Underground. How did he get there, and what has happened to the plans?