Trying to survive the separation from her husband, successful writer Elena rents a house in a small Swedish town. On the verge of a breakdown, she can neither write nor sleep and becomes increasingly distant from family and friends. But she unexpectedly finds comfort in watching the prosperous family living across the street. The more Elena watches them, the more convinced she becomes that something strange is happening in the lives of her neighbors, and this mystery both fascinates and frightens her. Inspiration and passion for writing awaken in her. It seems that behind the neat façade, a real drama is playing out. One day, Elena learns from her neighbors’ son that his mother is a woman with a dark past, capable of terrible things. The writer becomes obsessed with this family and begins to stalk her neighbors, turning into their shadow. But as the danger increases, the line between imagination and reality begins to blur. Now Elena herself is threatened with death.