Hazel has been gone from her small hometown of Idless in the English countryside for years. Now returned in the wake of a traumatic divorce and crumbling personal life, her simple plans are to lay low at her parents’ vacated house, reconnect with her prickly sister, Cathy, and slowly get back on her feet. Cathy is surprised when Hazel doesn’t show. Their relationship strained from a fallout half a decade ago, she didn’t expect them to get back into a sisterly rhythm…though she hadn’t counted on Hazel bailing, either. But something isn’t adding up. Other people in town whisper of a threat that can’t be shaken. The woods are known for being restless. And Cathy knows the old saying: If you go looking for trouble, you just might find it.

Newly minted child psychologist Mina aimlessly spends her days stuck in the stifling heat wave sweeping across Britain. The only reprieve from her small, close world is attending the local bereavement group to mourn her brother’s death from years ago. That is, until she meets journalist Sam Hunter at the grief group one day. Alice Webber is a 13-year-old girl who claims she’s being haunted by a witch. Living with her family in their crowded home in the remote village of Banathel, Alice’s symptoms are increasingly disturbing, and money is tight. Taking this job will give Mina some experience; Sam will get the scoop of a lifetime; and Alice will get better. But instead of improving, Alice’s behavior becomes increasingly inexplicable and intense. As Mina races to uncover the truth behind Alice’s condition, the dark cracks of Banathel begin to show.