Vermont, 1950. There's a place for the girls no one wants -- the troublemakers, the illegitimate, the too smart for their own good. It's called Idlewild Hall. Rumor has it that the boarding school is haunted, and four roommates bond over their whispered fears -- until one of them disappears. Vermont, 2014. Journalist Fiona Sheridan cannot stop revisiting her older sister's death. Twenty years ago, her body was found in the fields near the ruins of Idlewild Hall. Her sister's boyfriend was tried and convicted of murder, yet Fiona can't shake the suspicion that something wasn't right about the case.

Then renovations at Idlewild Hall yield a shocking discovery.