nancy is trying to find a hidden place to get to the house. she is looking for secret doors and pasage ways. the ghost robber is not getting in the front door. he has to be getting in through a secret passageway. nancy and helen cannot find a single passage way. they call the police to have a night guard come out to watch the grounds for any intruder. the next day nancy and helen go to the outbuildings to look for a secret way to the house. they do not find anything. nancys dad is coming home soon. her dad calls her and tells her that he will be there a little later then expected. nancy is starting to get worried.