<p>Vida Anstruther's father has gone missing on his latest secret mission, ostensibly to Hungary and her sixth sense tells her that he has actually gone undercover to Russia and is in desperate danger, perhaps at the ruthless hands of the Czar's Secret Police.<br>Having informed the Marquis of Salisbury, the British Foreign Secretary, of her intentions, she sets off under a false name, accompanied only by her faithful Nanny, Margit, and...