Detective Patrik Hedstrom takes on the investigation, aided by his wife, crime writer Erica Falck, who has always been fascinated by the mystery of Ebba's abandonment and the family's tragic history. When dried blood is found under the floorboards of the old house, it seems that the cold case involving the missing family is about to be brought back to life. And soon, Patrik and Erica are consumed by the hunt for a killer who will stop at nothing to keep the past buried...