Leigh Michaels (Lauren Hutton) takes a room in a high-rise apartment building where the previous tenant committed suicide. Soon after, Leigh begins receiving mysterious phone calls, getting anonymous gifts in the mail and finding that her room has been searched by someone. When a letter finally arrives in which her tormentor expresses his intention to kill her, she takes it to the police, but they're unable to do anything. Terrified, Leigh nevertheless decides to find the culprit herself.