Joan Collins stars in this this tense study of paranoia set in a boy's prep school that has pervasive surrealistic qualities. In it, a young woman (Geeson) who has recently suffered a nervous breakdown moves with her husband to a rural English boarding school. However, her nerves are not assuaged when she meets the school's intimidating headmaster (Cushing) and his vampy wife (Collins). Unfortunately, Geeson's tension only gets worse when she finds herself being stalked and harassed by a one-armed man who seems to be a deranged psychotic. Unable to convince anyone that what is happening to her is real, Geeson begins to suspect her husband of trying to kill her until one night of almost unbearable terror that reveals a secret more shocking than anything she could have imagined.