As a devastating pandemic ravages the world, a mother isolates her family in a remote cabin, where survival depends on vigilance. But when a mysterious stranger appears at their doorstep, the sanctuary they’ve fought so hard to preserve begins to unravel. Buried truths emerge as a deadly confrontation spirals out of control. With everything he loves hanging in the balance, a young boy is forced to make an impossible choice—one that will determine the fate of his mother, his sister, and the only world he’s ever known.