The Adventure of the Bruce-Partington Plans

by Arthur Conan Doyle

"The Adventure of the Bruce-Partington Plans" by Arthur Conan Doyle is a short story published in 1908. When Mycroft Holmes arrives through London's thick fog with urgent news, Sherlock faces a matter of national security: secret submarine plans have been stolen, and a young government clerk lies dead beside Underground tracks. With only seven of ten plans recovered and no clear explanation for the victim's final movements, Holmes must unravel how a body appeared on the railway and who possesses the missing documents before Britain's naval secrets fall into enemy hands.