What should an aristocrat do if he’s troubled by his cousin’s strange behavior—especially his habit of constantly wearing gloves? Or a schoolteacher whose brothers have mysteriously disappeared—watchmen of a lighthouse? Or an English intelligence service that needs a brilliant chief so it doesn’t fail in a world war? Or even Winston Churchill himself, the Home Secretary, challenged by an anarchist international?
Of course, everyone of them can be given advice with absolute certainty: the shortest way to solving the problem leads through 221B Baker Street, where live the well-known Mr. Sherlock Holmes and Dr. Watson.