Fredrik considers himself lucky: he has a good job, a wonderful family, and a house in a paradise-like location. But then the idyll begins to crack. His sleep disturbances would not be worth mentioning if it weren't for this little man whom Fredrik keeps encountering in the house at night. A troll? An animal? A werewolf? Does this strange fellow, who calls himself "Kwådd" and claims to live under the stairs, even exist? And why is Fredrik's wife increasingly distancing herself from him? Marie Hermanson, the Swedish bestselling author, transforms the dream of a perfect family into a murderous nightmare in her gripping, dark psychological thriller.