Sadie Asquith has always been fascinated by the dark past of the Essex witch hunts. But as she researches the troubled era that saw over 500 women tried for witchcraft, Sadie experiences strange, ghostly visions. She hears a terrifying sobbing at night and black moths appear from nowhere. It's as if she has opened an unearthly connection to these women. And something in the modern world is haunting her too: Sadie feels she's being watched. Is she under threat or is she losing her mind? Can Sadie find peace for the witches and a safe path for herself?