The third and least political novel of the Palliser series, The Eustace Diamonds concerns the beautiful pathological liar Lizzie Greystock. Determined to marry into wealth, Lizzie snares the ailing Sir Florian Eustace and quickly becomes a widow. Despite the brevity of their marriage, Lizzie still inherits according to the generous terms of Sir Florian's will, which include the Eustace diamonds. When the Eustace family solicitor, Mr. Camperdown, begins to question her legal claim to the family heirloom, Lizzie begins to weave a tangled web of deception and crime to gain possession of the diamonds.