Fran Hall and her husband, Nathan, live in a run-down farmhouse on the edge of the Fens, where they recently moved from London with their two young children. One February night Fran awakes to an empty bed and goes searching for her husband. She finds Nathan behind their house, lying facedown in a ditch. The ensuing police investigation soon singles Fran out as the primary suspect, and suspicions mount on the force that she may be hiding something that gives her a motive for murder. But Fran isn’t the only one with something to hide; as her isolation and paranoia increase, the claustrophobic town where her mysterious husband grew up begins to disgorge its secrets, and it becomes increasingly clear that Nathan wasn’t very honest with her about who he was. As police scrutiny intensifies, Fran must delve deep into her husband’s shadowy past in the hopes of clearing her name, and she doesn’t much like what she finds.