You might think that helping a friend's widow to stop a lawyer from stealing her husband's corpse would be the strangest thing on your To Do list. But it's rarely that easy for Felix Castor.

Before he died, Castor's fellow exorcist John Gittings made several calls asking for help and if Castor had answered them, John might still be alive. So when a smooth talking lawyer comes out of nowhere to claim the remains, Castor owes it to John's unhappy ghost and even more unhappy widow to help. If only life were that simple.

A brutal murder in King's Cross bears all the hallmarks of a long-dead American serial killer, and it takes more good sense than Castor possesses not to get involved. He's also fighting a legal battle over the body - if not the soul - of his possessed friend, Rafi, and can't shake the feeling that his three problems might be related.

With the help of the succubus Juliet and paranoid data-fence Nicky Heath, Castor just might have a chance of fitting the pieces together before someone drops him down an elevator shaft...