In Winterhall, Vermont, children vanish, their broken toys left in eerie circles in the forest. Jack Harris, a grieving father, receives a blood-soaked teddy bear—his missing son Owen’s— sparking hope and dread. With Ellen, another parent desperate to find her son, Jack uncovers a sinister force tied to an abandoned toy factory, where whispers lure kids to a hungry void called the Hollow. As toys come alive and shadows wear children’s faces, Jack must confront the truth: Owen may not be dead, but taken.