She bought this house to save her marriage. Unearthing its secrets might just claim her life. Gwen McDaniel's life is broken. But she knows the perfect place to fix it. Cold Harbor, Maine, an idyllic small town with views of Acadia National Park, is where she used to vacation with her parents as a child. Here, she and Steven can start over, renovating their cliff-side fixer-upper while patching up their marriage. Soon, everything will be better. Except from the moment they arrive, Gwen sees and hears things, and it's more than just the drafts and shadows that are part of any old house.

Steven downplays her fears, warning her not to fixate on problems as she has in the past. But Gwen spent years as a homicide detective, and her instincts don't lie. Something happened here. Proof comes when she rips up the attic's carpet to discover a chilling message carved into the wood underneath. As Gwen delves into the history of the house and the Cold Harbor community, she begins to piece the fragments together. And gradually, a terrifying picture emerges: A missing girl. A house of horrors. And a dark, decades-old nightmare that is more haunting than Gwen ever imagined.