Jane Darrowfield is using her retirement years to work as a professional busybody, with most of her business coming from her West Cambridge, Massachusetts, community. This time her client is right next door… Megan, who's purchased the house next to Jane's, needs some help from her snooping neighbor. Megan's been having blackouts, hearing voices—and feeling like someone's following her. Are these symptoms of an illness—or signs that she's in danger? Considering the extensive security system in Megan's house, it seems like she should be safe—yet she soon vanishes into thin air. Some think she's run away, but would this ambitious young lawyer on the partner track really miss a meeting with an important client? And where's Megan's cat? The mystery is about to deepen when the cat is finally located in a hidden panic room—and as Jane and the police look into Megan's friends, family, and past, it may be time to sound the alarm…