More than sixty years after one of four friends in a reputedly haunted boarding school goes missing, journalist Fiona Sheridan resolves to learn her sister's fate before a harrowing discovery is made.

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 in the small town of Barrons, there are rumors that the boarding school is haunted. Four roommates bond over their whispered fears-- until one of them mysteriously disappears. 2014: Journalist Fiona Sheridan cannot stop revisiting the events surrounding her older sister's death twenty years earlier; Deb's body was found lying in the overgrown fields near the ruins of Idlewild Hall. Now the Hall is being restored by an anonymous benefactor, and shocking secrets are uncovered-- secrets that were meant to stay hidden in the past... and a voice that won't be silenced.