She's getting ready for college, living in a Brooklyn apartment, and hanging out with her best friend and roommate Del. But now it's all catching up with her: her mother's mysterious disappearance a decade before, her father's outlandish theories about a lost supernatural race, and Hayden's own dark dreams of strange symbols and rituals in the Colorado woods where she grew up.As soon as Hayden arrives at her hometown, her friend Del in tow, it begins: Neighbors whisper secrets about Hayden's mother; the boy next door is now all grown-up in a very distracting way; and Hayden feels the trees calling to her. And among them, deep in the woods, Hayden will discover something incredible—something that threatens reality itself.