Suspicion at Sanditon (Or, the Disappearance of Lady Denham)

Does a kidnapper lurk in a centuries-old mansion, or is a still more sinister force at work? As the night grows short, the house's population steadily dwindles, and long-buried secrets emerge, Mr. and Mrs. Darcy find themselves leading a desperate effort to discover what has happened to Lady Denham and the missing guests, before they all disappear.