Meet Arshile Grekov. A reclusive Russian oligarch, he lives in Holland Park 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 his beloved son, a loud, druggy, dissolute Etonian, is secretly involved with a white-Russian princess. As a former spy, he knows he will always remain of intense interest to the paranoid Russian government. When Grekov's private security force is infiltrated, he turns to former MI5 agent Tony Underwood to prevent further mischief.