Sweetheart

After an enigmatic force is unleashed on humanity, Sweetheart, a young girl, starts to detect unusual behavior from her parents-detachment, disorientation and cognitive interruption. Sweetheart begins to fear for her own life, as the adults around her begin to devolve into beings whose only motives are to satisfy their most primal urges. In a moment of true clarity, Sweetheart must gain the resolve to overcome her childish inclinations, and fight for survival in a nightmarish reality, where her only way out is through. - IMDb