Meet Arshile Grekov. A Russian oligarch, he lives in Holland Park, London, as a recluse in exceptional opulence after successfully extricating his gigantic fortune from Russia. He is deeply worried. His doctors are confounded by his slowly failing health and then there is his beloved son, a loud, druggy, dissolute Etonian secretly involved with a white-Russian princess. As a former spy in Russia's elite military secret service, he knows he will always remain of intense interest to the paranoid Russian government. When Grekov's private security force is infiltrated by a potential spy, he turns to former MI5 agent Tony Underwood to prevent further mischief...