The creative minds behind the hit Insidious trilogy return for a terrifying fourth chapter that sees Dr Elise Rainier contacted by a desperate family, who are being haunted by a malicious key-fingered apparition with the ability to turn off its victim's screams. After accepting their call for help, the brilliant parapsychologist and her two ghost-busting sidekicks, Specs and Tucker, must go deeper into the Further as Elise must faces her most fearsome and personal haunting yet: in her own family home.