The members of the dysfunctional Parker family have had their fair share of complications. When matriarch Kate Parker miraculously survives plummeting over a waterfall in a barrel, a feat captured on a video that goes viral-,the Parkers have to do something they never thought possible: act like a real family.

It's Halloween eve on Shelter Island, and the small town is preparing for a killer storm. But the dark clouds gathering over the island are bringing with them a curse one-hundred years in waiting. As the woods give birth to an ungodly and insatiable creature of fire, bones, and earth, three sisters must scramble to stay alive through the long dark night of the Hollow. For it's not something you can kill. It's only something you can try and survive.