Isolated in a picturesque but remote castle deep in a Styrian forest, Laura spends her days with her family, longing for a companion her age. Her wish is granted when a carriage accident outside her home brings a girl her age into the family's care, and the two—recognising each other from dreams seen years before—become fast friends. Though they get along well at first, the stranger's eccentricities slowly become cause for concern, as do the murders that begin to plague the towns around them...