John Constantine is back in London, back to his old tricks-and just in time, as things have become very dark indeed in his old stomping grounds. A small-time gang lord has found himself dealing with a big-time outbreak of supernatural weirdness...and without any allies to call on and nothing left to call his own, John doesn't have much choice about taking a paycheck from one of London's worst, or accepting the help of one of the gang lord's would-be foot soldiers. But what should be an open-and-shut exorcism turns out to be nothing but...and the author of this madness may just be getting started on their terrible masterpiece!