Adam (Gabe Nicholson) lives a lonely existence in a cabin in a desolate forest, checking “Deer Cam” feeds on his computer and occasionally receiving visits from his brother Pete (Michael Daniel). Another family member looms large in his life: his grandmother “Nani” (June Petersom), who has long been a receptor for a spirit she calls Sator. This presence has been getting into her head and “training me, teaching me to be a person,” Nani says, and Adam slowly discovers that it has a more malevolent purpose as well. No longer confined to Nani’s psyche, Sator begins manifesting in other ways, threatening the lives of Adam and his troubled family.