The world of John Strange is no ordinary place - full of malevolent demons that must be stopped from wreaking havoc upon the Earth. In his quest he is joined by nurse Jude Atkins, computer whiz Toby and Kevin, a man who can pick up on strange vibes. But the mysterious Canon Black remains a thorn in John's side, fervent in his efforts to prove the non-existence of anything remotely demonic or paranormal...

C'est dans un univers fantastique, peuplé de démons, que John Strange, un ancien prêtre, doit faire face à une succession de meurtres étranges. Il sera épaulé de Jude Atkins, une scientifique et de Cannon Blake, un homme mystérieux...