The miniseries stars 2014 Cannes Film Festival Best Actor Timothy Spall (Harry Potter, The King's Speech) as Maurice Grosse, a rookie paranormal researcher, and BAFTA nominated actress Juliet Stevenson (Emma, Truly Madly Deeply, The Village) as his grieving wife Betty. BAFTA winner Matthew Macfadyen (Ripper Street, Frost/Nixon, Pride and Prejudice) portrays Guy Lyon Playfair, an experienced investigator who approaches the case with skepticism.

Following a personal tragedy, Maurice is drawn to the house in Enfield after disturbing reports of a desperate family terrorized by malevolent unseen forces. Working together to get to the heart of the supernatural happenings, Maurice and Guy find that they cannot save the tortured family without first coming to terms with their own demons.