Though written better than some of the ND books, this one is so convoluted I can only imagine myself at eleven or twelve years old saying what? What just happened? What?
There's an old man being kept 'sortof' as a prisoner in the tower room of a mansion, and said mansion is now a restaurant. Said mansion is also filled with all sorts of rooms and corridors and even, added at the very end of the story, a hidden staircase. Okay, so when you need a way for evil persons and their cohorts to get in and out of a big, spooky house, ADD a staircase, make it hidden, tell everyone that oh, we sortof forgot that was there!
Now add in a banker who acts like a superhero and is only on scene when needed; a prominent lawyer,Carson Drew, who is really a big-time player in this story; a foster child being overworked and abused by her foster parents; a long-time family feud which just so happens to involve Nancy's two friends, Bess and George; AND a boyfriend who shows up at the most opportune of moments. Also, a storyline involving a will, hidden valuables, and guards who are too easily drugged to be believable. (Who needs security guards who are so stupid as to believe, hey, one of you can go home now? Oh, whoops, you're drugged!) This story is so bloated and contrived and trope-laden, it needs a new title: The Sign of the Twisted Tropes, and yes if you've ever heard of a mystery contrivance, it's here...
Nancy gets drugged, hidden under a bed, hides in a closet (wardrobe), is briefly estranged from her two best friends, helps a foster child, and deals with two nasty people who are nasty from the get-go. She gets struck early on by a nasty woman but will 'let it go' if the woman promises to treat her foster daughter better. (Like that would happen! Come on!) Nancy drags her father into things as well as kindly Hannah Gruen, the housekeeper, a woman who stupidly allows the foster girl to be kidnapped right from under her nose! (Fire that woman, please, Mr. Carson Drew, you prominent lawyer, you!) There's a terrible storm at the start of the book - isn't there always? - and tire-slashing and car chases involving a taxi and people creeping around with boxes which they bury in a mere foot of dirt or hide in an old building. There are so many characters in this short little book I should have made a cue card. (Sometimes I do!)
The book was a whirlwind of convolution, contrivance and complete confusion. I cannae give it any more than two stars and even that's generous.