Kate Wilson (Annette O'Toole), leads a double life by spending her days working in a real estate office while spending most nights caring for her ailing mother, Mrs. Wilson (Eva Marie Saint). One night a week, however, she changes into a bright red cocktail dress and drives across town to ritzy bars looking for one night stands with different men. One of these encounters brings her into close contact with a serial rapist who has just stepped up to homicide.