A “clever and wonderfully chilling” (Fiona Barton) suspense novel from the award-winning author of The Haunting of Maddy Clare—a National Bestseller!

Vermont, 1950. There's a place for the girls whom no one wants—the troublemakers, the illegitimate, the too smart for their own good. It's called Idlewild Hall, and local legend says the boarding school is haunted. Four roommates bond over their whispered fears, their budding friendship blossoming—until one of them mysteriously disappears....

Vermont, 2014. Twenty years ago, journalist Fiona Sheridan's elder sister’s body was found in the overgrown fields near the ruins of Idlewild Hall. And although her sister’s boyfriend was tried and convicted of the murder, Fiona can’t stop revisiting the events, unable to shake the feeling that something was never right about the case.

When Fiona discovers that Idlewild Hall is being restored by an anonymous benefactor, she decides to write a story about it. But a shocking discovery during renovations links the loss of her sister to secrets that were meant to stay hidden in the past—and a voice that won’t be silenced....