"During the height of the Great War, Prince Harry, third in line to the British throne, vanishes in thin air while horseback riding in Hyde Park. The strikingly handsome playboy prince is initially believed to have arranged his disappearance so he can enjoy a brief rendezvous with one of his secret lovers. But when his absence continues on for days, the royal family grows concerned and summons Scotland Yard, who can only recover scant, unrevealing clues. The concern deepens when MI5 decodes a recent message from German spies in London which speaks of a captured asset that will bring great embarrassment to the Crown. There is a strong belief within the Intelligence agency that plans are underway to transport the captive prince to Berlin without delay. Despite an intensive search, no trace of the royal can be detected. With Scotland Yard and MI5 baffled, Joanna and the Watsons are called in, and they soon find themselves entangled in a web of abortion, murder, treason, and spies, all of which is seemingly being orchestrated by an arch-enemy of the long-dead Sherlock Holmes. In their race to rescue Prince Harry, it becomes clear that the mastermind behind the maze of crimes has a singular motive in mind. He desires overdue revenge in the form of Joanna's death."--