New York detective Ebenezer Gryce enlists Amelia Butterworth to help investigate a series of mysterious disappearances in a village in the Berkshire Hills. When Miss Butterworth goes to stay with the family of an old friend in their decaying village estate, she discovers a web of deception. She must work with Mr. Gryce to untangle the threads and discover the fate of the “lost men”—and the secrets of her friend’s family.