2018年10月，三名学生失踪。莎拉·麦考密克，凯尔·米勒，约瑟夫·摩尔。当局现在提供的信息是，在约斯特被遗弃的家中发现了视频监控，显示了工作人员在神秘失踪前最后几分钟记录下影子人物的情况。
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. - Written by Anonymous
