Message in a Haunted Mansion is the 3rd installment in the Nancy Drew video game series by Her Interactive, and was released in 2000. It is preceded by Stay Tuned for Danger and followed by Treasure in the Royal Tower. It takes place in San Francisco, California, and is based on the Nancy Drew Mystery Stories novel #122, The Message in a Haunted Mansion.
Nancy is helping Rose, a friend of Nancy's house keeper, get settled into an old Victorian mansion in San Francisco that she is turning into a bed and breakfast. But, there are other uninvited guests, visitors from the past--spirits who want the place all to themselves. Strange accidents are slowing down the renovation, and Nancy is trying to figure out who, or what, is trying to scare everyone away. Nancy suspects that there is another force at work: greed.