As Sophie’s depression progresses, so does Diana’s presence in her life as her only ‘friend.’ Sophie is lured into surroundings of near total darkness – Diana’s refuge from even the slightest ray of light which can burn her skin. But her depression recurs as Diana’s spirit continues to follow her and gets in the way of her getting any medication. Sophie, previously confined for depression, got out of the institution. She died when a doctor, in an attempt to cure her, performed an experiment and over exposed her to light.
Diana had a rare skin disorder wherein her skin was oversensitive to light.
Lights Out is a horror movie about a mental patient, Diana, who haunts the family of Sophie, another mental patient she befriended when they were in confinement.