The faces were disfigured: all sores, terrible teeth and mouths, and they were all biting, like biting towards me. It was like a vision from hell, worse than anything you could ever dream about, and the stench coming from them was terrible. They just rose up out of the ground, staring at me, trying to attack me - but they couldn't because they had no bodies that I could see. Just the heads. I'll never forget them. I thought I was going to die at that moment. I was calling out to my wife and Jim and Margaret. The heads were shrieking. It was as if they were waiting for Sherrin to kill me. Like I was some sort of offering that he was making to them. from Mr Gant and the Neighbour from Hell

An innocent housewife, a callow young curate, a curious schoolboy, an amiable pensioner, and others like them. Ordinary people, leading ordinary lives in present-day Ireland. Until unwittingly each opened a door into the unknown, and allowed strange forces to enter their lives.

Through their shocking, true stories, The Dark Sacrament charts the terrifying struggle against the preternatural, battles that only ended with the intervention of that most valiant of churchmen - the exorcist.