Shadow Puppets

Synopsis: Eight people awake in an abandoned asylum without any previous memories of their whereabouts. They soon discover they were subjects of an experiment gone haywire. The experiment was intended to erase bad memories, but accidentally released a monstrous, blood-thirsty entity within the asylum. As they piece together their memories, a vicious Shadow Creature stalks them, threatening their lives from the darkness.     Source: RottenTomatoes.com