Twelve contestants in a TV reality show are locked in separate rooms in the dark for a month. The house is riddled with "night-vision" cameras.Twelve contestants in a TV reality show are locked in separate rooms in the dark for a month. The house is riddled with "night-vision" cameras.Twelve contestants in a TV reality show are locked in separate rooms in the dark for a month. The house is riddled with "night-vision" cameras.