On the night before Halloween, the residents of Shelter Island brace themselves for a devastating storm. However, the ominous clouds looming over the island also herald the arrival of a century-old curse. From the depths of the forest emerges a monstrous entity composed of fire, bones, and earth, driven by an insatiable hunger. Three sisters find themselves in a desperate fight for survival throughout the endless, terrifying night in the Hollow. This creature cannot be defeated; the only hope is to endure its wrath.