Inspired by a true sensational mystery. Solved in the vintage Agatha Christie style by who else, but the redoubtable Geeta Ratan. DELHI: Sunaina Pushkar, 51-year-old wife of Sanjiv Nair, the ultra-suave Minister of External Affairs, is suddenly found dead in her suite in a luxurious five-star hotel. Nobody knows who killed her or what killed her. Even her autopsy report is not able to find the cause of her "sudden, unnatural death."...