Catherine Ferry - a forensic odontologist, a specialist in bite marks, demonstrating a brilliant understanding of the motives of rapists and murderers, an alcoholic with a shattered psyche - cannot bring herself to face her own past, in which the sound of rain on a galvanized roof remains, causing horror. an orange pickup truck, bloody footprints on the carpet... Can these memories be trusted? Or is the truth so distorted that the girl will never know the true history of her family? Solving a series of mysterious murders means not only the capture of a ruthless maniac - perhaps for Katherine this is the only way to maintain her sanity...