A woman named Nora confronts her husband about losing three hours of memory after dropping their daughter Lily at school. Her husband reveals she threw a lamp at the door earlier, and a doctor visits, diagnosing her with memory gaps and hallucinations. Nora insists her blackouts are connected to the town's strict rule: never open the door after 8 PM. As evening approaches, she receives a warning call from her mother, who reminds her not to open the door for anyone after dark, even if her family is outside.