Nancy Drew is helping Rose Green, a friend of Nancy's housekeeper, with some renovation work in an old Victorian mansion in San Francisco that she is converting 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.