Nancy Drew recieved a call one morning from Helen Corning asking her if she could help solve a mystery at Helen's great grandmother and Great aunt's home. Later after taking the case, a man named Nathan Gomber warned Nancy to stay with her father at all time because he is in grave danger. Nancy's father told her not to worry about him, and to take the case at the Twin Elms Mansion. He was going to Chicago to find a man named Willie Wharton and confirm that he signed a contract for a railroad company. When Nancy arrived at the mansion, she was told that there were many mysterious occurences there. Strange music playing from the second floor, Stolen items, and even objects moving. Coincidentally, Mr. Gomber was also trying to buy the mansion from Miss flora even though there was one identical to it.
Nancy Drew would make plans to try to catch the ghost in the act, but some how never could. She suspected that there must be microphones hidding in the house somewhere and the ghost must be listening to all of their plans. She suggested that they call the police, and ask them to send a gaurd to watch the mansion grounds at night. Nancy's father had not yet returned from Chicago, and she became worried. She learned from an eye witness at the train station that he might have been drugged and kidnapped. Nancy kept searching for clues on her missing father, and also for the intruder.
Nancy Drew would make plans to try to catch the ghost in the act, but some how never could. She suspected that there must be microphones hidding in the house somewhere and the ghost must be listening to all of their plans. She suggested that they call the police, and ask them to send a gaurd to watch the mansion grounds at night. Nancy's father had not yet returned from Chicago, and she became worried. She learned from an eye witness at the train station that he might have been drugged and kidnapped. Nancy kept searching for clues on her missing father, and also for the intruder.
Nancy, Helen, and Aunt Rosemary found a secret door to the roof of the mansion in the attic. While upon the roof, she sees a shadow inside of Riverview Manor. She suspects that it might be the ghost. Unfortunatly Mr. Gomber had already bought the manor so she couldnt go investigate. The realtor changes his mind, and give Nancy the key to the mansion. There Nancy and Helen find the hidden passage on the second floor behind a closet. There they found Willie Wharton.Hhe admitted to being the one scaring Miss Flora and Aunt Rosemary. He said that he was working with Nathan Gomber because he was trying to buy the house from the old ladies. With the information given to Nancy by Willie Wharton they were able to find nancys father and solve the mystery. In the end Nathan Gomber was imprisoned.