Lord Peter Wimsey and his friend Chief Inspector Parker are told about the death, in late 1925, of an elderly woman named Agatha Dawson who had been suffering from terminal cancer. She was being cared for by Mary Whittaker, her great-niece and a trained nurse. Miss Dawson had an extreme aversion to making a will, believing that Miss Whittaker, her only known relative, would naturally inherit everything. Wimsey is intrigued in spite of the fact that there is no evidence of any crime (a post-mortem found no sign of foul play), nor any apparent motive (on Miss Dawson's death her estate did indeed pass, as she had expected and wished, to her great-niece).
