Chapter 1: Lord Peter Sees a Ghost
* Lord Peter Wimsey witnesses a strange scene in a London park: a young woman, apparently asleep, is surrounded by a group of people who seem to be unable to see her.
* Real Example: Lord Peter observes a woman in a white dress who seems oblivious to the crowd around her.
Chapter 2: The Body in the Library
* The body of a beautiful young woman, identified as Ruby Keene, is discovered in the library of the Duke of Denver.
* Real Example: Ruby Keene is found dead in the Duke's library, her body covered with an antique book.
Chapter 3: Lord Peter Investigates
* Lord Peter, being an amateur detective, offers his assistance in the investigation.
* Real Example: Lord Peter examines the body and the library, looking for clues.
Chapter 4: The Girl Who Knew Too Much
* A young woman named Frederica Price claims to have seen Ruby Keene alive after the time of her supposed death.
* Real Example: Frederica identifies Ruby Keene from a photograph and reveals that she saw her in a taxi after the reported time of death.
Chapter 5: The Poisoned Letter
* Lord Peter receives a threatening letter that contains a poisonous substance.
* Real Example: Lord Peter opens the letter and experiences a burning sensation on his hand.
Chapter 6: The Case of the Missing Wife
* The investigation reveals that the Duke of Denver's wife, Marcia, has been missing for a year.
* Real Example: Lord Peter discovers that Marcia was secretly in love with Ruby Keene.
Chapter 7: The Red Herring
* A man named Charles Enderby attempts to take the blame for Ruby Keene's murder to protect his friend, Lord Mountjoy, who is in love with her.
* Real Example: Enderby confesses to killing Ruby but later retracts his statement.
Chapter 8: The Hidden Room
* Lord Peter uncovers a hidden room in the Duke's mansion, where Ruby Keene had been hiding.
* Real Example: Lord Peter finds a secret passage leading to a hidden room where Ruby kept her belongings.
Chapter 9: The Unmasking
* Lord Peter reveals the true killer: the Duke of Denver himself.
* Real Example: The Duke confesses that he killed Ruby Keene in a fit of jealousy when he discovered her affair withMarcia.
