"The Dead Secret" starts with a chapter where Mrs Treverton was lying dying in Porthgenna Tower on the west coast of Cornwall. She told her maid, Sarah Leeson, her last confession for her husband. Sarah promised neither destroy it nor take it away from the house. The maid hid the confession in an unused room. 15 years later Rosamund Treverton, the daughter of Mrs Treverton, married the blind Leonard Franklin who that time owned Porthgenna Tower. Sarah was working as a servant under an assumed name and tried to prevent Rosamund going to the unused room where the secret is hid. But Rosamund found it and that completely changed her life. What was inside the confession? Read the novel and find out yourself.