When the body of a young woman is found on the Lady Chapel altar in Hereford Cathedral, it appears that serial killer The Sacristan has set the grandest stage yet for his unholy tableaux, and the newspapers waste no time in stoking up public fear and fury. But there are slight differences between this case and those of The Sacristan so, fearing that a copycat killer has taken up a grisly challenge, Lambert and Hook set about discovering all they can...