In the tense winter of 1936, with the British monarchy facing its gravest crisis in centuries, the government turns once more to Mycroft Holmes. King Edward VIII is determined to marry Wallis Simpson, a twice-divorced American, risking the unity of the Empire and the Church. Mycroft must navigate a labyrinth of royal secrecy, blackmail, and delicate statecraft to prevent a scandal that could shatter the Crown. From the drawing rooms of Windsor to the archives of the Royal Physician, he orchestrates a dangerous game where the fate of a king—and the future of a nation—hangs in the balance.