The Shortest Way to Hades

To avoid taxes, the family agrees to change the trust and support heiress, ravishing raven-haired Camilla Galloway, except dreary Cousin Deirdre, who wants money, then dies. The young London barristers handling the trust, especially suspicious Julia, summon Oxford friend Prof Hilary Tamar. Accidents escalate. And the naked lunch at Uncle Rupert's?