This decidedly somber film was written and directed by Ingmar Bergman. Karin (Harriet Andersson) is a released mental patient who returns home to relive the security of her childhood. Her loving husband Martin (Max Von Sydow) is a medical school physician and teacher she no longer has feelings for. Her writer father keeps a journal of his daughter's condition with an eerie fascination for her deteriorating condition. Karin seduces her 17 year old brother when he confesses he has never had sex. Her dreams are interrupted by voices she believes come from another world.