After surviving a terror attack that took her husband, Lucy is trying to rebuild her life for her two teenage children. She makes the decision to move them all to an off-grid mountain community. Away from the insanity their life had become, their temporary solution becomes a permanent way of living. Lucy believes she is giving her kids the perfect life, and a way of living that they truly want. Until the day her son, Vincent, decides to leave without saying a word. Lucy and her daughter, Avery, leave their secluded life to search for him in the nearby town. But what they find is nothing short of shocking. Everyone is dead and there is no sign of Vincent. Soon Lucy learns that it isn't just the town of Piedmont, it is everywhere. A fast-moving phenomenon sweeps across the globe, pushing mankind to extinction and allowing only a few to survive. Lucy pushes on in her search for her son, but can she find him before he crosses paths with the anomaly . . . or is it already too late?