Horror films aim to elicit emotions of fear, horror and terror in viewers through plots involving death, the supernatural, or mental illness. They often feature a central villain and take place in isolated settings like haunted houses or the woods. Visual styles in horror movies commonly include shadows, low key lighting, and point-of-view shots. Iconography in horror frequently depicts symbols of death, disfigured faces, screaming victims, and weapons like knives. Narrative devices generally include a hero, villain, victim, and helper as the hero tries to save the day from the antagonist.