The film deals with the case of the Enfield Poltergeist , which took place in the London Borough of Enfield from 1977 to 1979 .
The film involved the alleged haunting of two sisters , aged 11 and 13 , at their mother 's council house .
The film deals with the case of the Enfield Poltergeist , which took place in the London Borough of Enfield from 1977 to 1979 , and involved the alleged haunting of two sisters , aged 11 and 13 , at their mother 's council house .