When John Appleby's wife, Judith, sets eyes on Scroop House, she insists that they introduce themselves to the owners—a suggestion that makes her sometimes reserved husband turn very pale. When Judith hears the village gossip about the grand house, she is even more intrigued; but when a former employee is found dead in the lock of the disused canal, and the immense wealth of Scroop's contents is revealed, Appleby has a gripping investigation on his hands.