The British Prime Minister himself calls at Baker Street to seek Holmes's help with a political crisis. A highly confidential letter from a foreign power has been stolen from the Secretary of State for European Affairs, threatening the world with war. Minutes after the Prime Minister's departure, Holmes receives another visit, from a veiled lady.In his investigation, a bloodstain is clearly an important clue, but whose is the blood? Holmes sees through the deceptions of great and small alike.
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